Spotlight on Hardy Geraniums

Geraniums often bring visions of Grandma’s garden with their robust, scented foliage and dazzling flower heads. These geraniums are annuals for most regions and belong to a separate genus in the Geranium family known as Pelargoniums. Today, however, we are going to take a look at another type of perennial geranium in the same plant family known as hardy geraniums or cranesbills.

Max Frei Bloody Cranesbil first bloom of the season

Hardy geraniums come in a variety of growth habits, flower color and bloom time.  They can be hardy for zones 5-81.  Geranium flowers have 5 sepals, 5 petals and stamens in groups of 52.  Some are long season repeat bloomers while others give a flush of blooms once a season.  The leaves are lobed and can have varying degrees of dissection between cultivars.   Some cultivars have foliage that turns a beautiful red color in the fall, extending their season of interest.   

Rozanne Geranium using Gaura as a support

One of the best known varieties of cranesbill geranium is Rozanne with its purple-blue flowers.   Rozanne is a vigorous perennial that plays well with other plants, using them as support as it winds and weaves its way around. It has a growth spread of up to 3 feet3 but can be sheared back to rejuvenate if it begins to appear leggy. It blooms from late spring through autumn.   

In contrast to its more vigorous
growing cousin, Max Frei Bloody cranesbill grows in a tidy, mounding clump of 12-18 inches with small bright magenta flowers against its rich green foliage. A perfect front-of-the-border perennial.   The foliage turns brilliant red in the fall extending its season of interest.  

There are also varieties of hardy geraniums that have deep dark foliage such as midnight ghost with its chocolatey brown leaves, wine colored stems and white flowers.  In all, there are around 300 different cultivars4 of hardy geraniums and many of the lesser known varieties can be purchased online as bareroot plants.  They are wonderful plants that can add a pop of color to a garden or be used in a mass planting for ground cover.  

1. Cranesbill, Hardy Geranium

https://extension.illinois.edu/flowers/cranesbill-hardy-geranium

2. The Genus Geranium:  https://canr.udel.edu/udbg/wp-content/uploads/sites/16/2024/02/Geranium-Featured-Plant-Article.pdf

3. Geranium ‘Rozanne’ the 2008 Perennial of the Year

https://www.purdue.edu/hla/sites/yardandgarden/geranium-rozanne-the-2008-perennial-of-the-year/

4. Hardy Geraniums for Northern Gardens

https://www.chicagobotanic.org/downloads/planteval_notes/no22_geraniums.pdf

Container Gardening - Tomatoes...and more!

Container vegetable gardening is an accessible and rewarding way to grow your own food, whether you have a sprawling backyard or just a sunny balcony. Choosing the right vessel is the foundation of a successful container garden. Most vegetables need at least 12 inches of depth, and larger is generally better. A 5-gallon container works for compact plants, while tomatoes thrive in 10 to 15-gallon pots.

Make sure every container has drainage holes to prevent waterlogged roots. Skip regular garden soil, which compacts easily in pots. Instead, use a high-quality potting mix blended with compost for nutrients and perlite or vermiculite to keep it light and well-draining.

When it comes to what to grow, a classic and productive combination is tomatoes, basil and pollinator-friendly flowers. Tomatoes are a container garden staple.

“Compact” or "patio" varieties do especially well in pots. Look for “determinate” tomatoes if you seed start or purchasing starts for your container. These are the type of tomatoes that mature to a certain height and won’t overwhelm a container/small space. Basil is a natural companion plant that repels certain pests and thrives in the same sunny, warm conditions as tomatoes. Tuck in a few flowers like marigolds, nasturtiums, or zinnias to attract bees and butterflies, which are essential for pollinating your tomatoes and keeping your garden productive.

With the right size pot, a good quality potting mix, and a thoughtful combination of plants like tomatoes, basil, and pollinator flowers, you can create a thriving mini-garden almost anywhere. Keep up with watering — containers dry out faster than garden beds — and you'll be rewarded with a beautiful, productive space all season long.

For even more information on other vegetables and plants to grow in pots, go here: 
https://extension.oregonstate.edu/news/container-gardening-grow-vegetables-even-without-yard-space

Pruning Lilacs on the Old Homestead - What I Learned...

Before Pruning

It is late winter in the Treasure Valley, and you live in a rural area in an older home. The poplars have aged out and there are several stumps in the yard. The silver maples bordering the pasture are taking over. The cottonwoods are huge and messy. You play pick up sticks after every storm. The sumac is long and leggy and the one and the only lilac has been ignored for a long time. It attacks you when you mow and is curling under the eaves. There is a plan to paint the house this summer, so a plan is required to minimize the lilac’s size, so I began my research!

The best time to prune a lilac is in the spring a month after it blooms. This gives the plant plenty of time to develop buds for the following year. If flowering is your main priority, this is a good time to prune.

Lilacs can also tolerate a “hard prune” also known as rejuvenation pruning when dormant, which is cutting all the old stems to within 6-12 inches from the ground. In the spring new stems will grow. The advantage to this is that it really does not require much skill. The disadvantage is that it could take up to 3 years to bloom again.  This is best for lilacs that are overgrown and no longer flowering.

Selective heading cuts are best for managing the size of the lilac. Heading cuts are made by pruning the terminal part of 30% of younger stems back to a bud. This will help maintain its natural shape.

An alternative to the “hard prune” is to thin the oldest lilac stems by 30% also known as renewal pruning, using the “Three-year Plan”, when dormant to open up the shrub and contain it in its allotted space. This will also increase light penetration and air circulation.

 This is what I chose. I planned to prune 30%, but not to top it using the following steps:

After Pruning

1.Remove dead and diseased limbs. Remove the debris. It already looks better.
2. Remove crossing branches.
3. Working from bottom, thin 30% of stems to open up the tree.

I laid a tarp on the ground for clippings and tried to evaluate how much I had removed. It has been suggested to me to take a picture before and after pruning to help determine when I had reached my 30% goal, remembering that 30% is an ‘eyeball’ estimate. Less is more as they say. There is always next year.

Leafed out and Bloomed!

How does the lilac look? Better, but not perfect. Leafing out will help it a lot. I checked it yesterday (03/26/26) and it is starting to leaf out, and I can see buds on the branches. If there is not hard freeze, it will bloom this season. Some sources advise fertilizing and mulching after pruning, but there was a substantial mulch of cottonwood leaves around it, and I can fertilize once water is available.

Conclusion: Reading about pruning and doing it are two different things. It didn’t turn out to be as daunting as I had feared. 

Organic Gardening – What are the Benefits?

An organic gardener promotes natural ecosystems, focuses on soil health, composting and biodiversity.  They also avoid synthetic fertilizers, pesticides and genetically modified organisms.  What are the benefits of gardening this way?  Can I still get a bountiful crop of food from my home garden if I use these methods? Here's some guidelines!

Environmental benefits include building the soil, avoiding harmful chemicals, using nature as a teacher and protecting our pollinators.  Did you know that our pollinators are responsible for 1 out of 3 bites of food that we eat!  

What about soil building?  Using compost is an excellent way to introduce organic matter into the soil.  This feeds the microorganisms in the soil and helps the soil to be healthy and full of the nutrition your plants need to thrive.  What about using nature as a teacher?  We learn from hands-on experience, our successes and our mistakes.  

In the Treasure Valley, organic gardening offers unique regional benefits due to the area’s semi-arid climate and alkaline soils. By incorporating organic matter like compost, gardeners can improve soil structure, increase water retention, and reduce the need for frequent irrigation during hot, dry summers. 

Mulching is especially helpful in conserving moisture and regulating soil temperature. Additionally, choosing drought-tolerant and native plants can lead to more resilient gardens that thrive with fewer inputs. 

What about insect and disease control?  While there are safe, organic products to use in your home garden, there are also things you can do to prevent diseases and manage the insects in your garden.  Timing matters when planting and when using organic products to help your plants thrive.  Prevention is also key.  Pay attention to your garden, this way you can stop a small problem from becoming a big problem.  Educate yourself on what to look for.  Practice, experience and learning from others will help you to start implementing some of these practices in your own home garden.

Organic gardening is a great way to familiarize yourself with how things grow, when plants might need some help to thrive, and why our pollinators and our soil are so important to the success of gardening. 

Successful Transplanting Tips

Measure and record the soil and air temperatures in your garden or use a trusted local source for tracking temperatures like The Growing Degree Day Calculator, developed by UI Extension Educator Jemila Chellappa. Using this real-time information to determine planting dates every year will limit risk of frost damage. 

Whether you’re planting in plugs from the local nursery, potting up seedlings, or moving young plants in and out of your own greenhouse you can and should follow a few simple steps to successfully transplant vegetables and flowers this spring. As the days grow longer and the warmth of the spring sun fuels new life, remember that giving your plants extra attention during this stage is critical to ensuring they’ll thrive! Here are some easy tips to keep your garden happy: Rely on average soil and air temperatures rather than your zone frost dates when you’re ready to start outdoor plantings. 

 

Gradually acclimate young plants and plugs to their new space over the course of a week after any risk of frost if possible. Carefully prepare the planting holes paying close attention to depth to ensure roots are fully covered. This is a good time to add a small amount of mycorrhizal inoculant and organic fertilizer to each planting hole.

Hardening off process is next. “There are no hard and fast rules. Over a period of about a week, gradually increase the time the plants are in full sun, exercising care if a day is particularly hot or windy. Be sure to keep the seedlings well-watered, and avoid locations that might attract animal or insect pests.” (The Master Gardeners of Santa Clara, 2026) 

Now that your plants have hardened off and become familiar with their new home it’s time to pick a calm afternoon for planting. Be sure the planting area is well watered before beginning, carefully remove the plant from its container with clean hands and tools, place in the planting hole so the soil levels are even. Gently fill in with soil around the roots and firm it in place. Always water in plants after transplanting, even if the ground is moist, as this helps the root mass settle into the new soil. Settling new soil is very important to avoid air pockets around the root ball that can be fatal to a plant. Proper transplanting practices will lead to healthier more vigorous plants that require less maintenance.  

Native Flowers in the Home Garden

Spring is a perfect time to plan for new intriguing colors and features in the yard. With all the common plants available in local stores and greenhouses, one should check out the lesser-known native flowers for their unique charm. There are hundreds to choose from, and these native beauties hold up well under Idaho’s four seasons. Three lesser-known flowers, which are sure to steal the show in the yard, include the Rock Columbine (Aquilegia scopulorum), the Wild Blue Phlox (Linum lewisii), and the Bubblegum Mint (Agastache cana). 

The Rock Columbine is a little showstopper reaching its full height of 7 to 10 inches when bloomed out in blue flowers from May through August. It can grow in many soils including the common alkaline and clay soils of the Treasure Valley. Rock Columbine enjoys full sun or moderate shade, and though it can’t survive completely on its own without supplemental watering, it only needs watering when the leaves look stressed. This flower is not invasive and can easily be maintained.

Lewis Flax, also known as Wild Blue Phlox (Linum lewisii) is a fascinating native flower. Its blue flowers bloom in late spring to mid-summer, which have the curious habit of dropping to the ground after a day only to be replaced with others the next morning. The Lewis Flax isn’t picky with the soil it likes and requires moderate to little water. In fact, can be on the invasive side if it has a great water source. The Lewis Flax is 12 - 30” tall making it a great addition to the middle or back of your garden.

Another interesting flower is the Bubblegum Mint (Agastache cana) plant originally from New Mexico and western Texas. These form pink and violet flower spikes in late summer until the fall when it frosts.  This is a ‘leggy’ plant growing 36-40’ tall and works perfectly in the back of a garden or in a hard to grow section of well drained sand or gravel. Other great features to the Bubblegum mint include needing only 3 - 5 waterings a year and having no insect or disease problems. 

There are hundreds of native flowers growing in Idaho with just as interesting and beautiful flowers to pick from. Many of these thrive in xeriscapes and rock gardens, which means they can look stunning even with the water spigot turned down. Check out “Native Plants for the Intermountain West” for more native flowers with brief descriptions of what to expect from each plant and how to care for them.

Soil blocking for your Spring Seed Starting

Soil blocking presents several advantages for home gardeners, making it an attractive option for those seeking efficient, sustainable, and rewarding gardening practices.

Space Optimization: For home gardeners with limited space, seed blocking offers a compact and efficient way to start seeds indoors. By using soil blocks rather than traditional pots or trays, gardeners can maximize their growing area and cultivate a greater variety of plants in a smaller space.

Cost-Effectiveness: While initial investment in seed-blocking equipment may be required, the long-term savings are significant. Soil blocks can be made using simple tools or purchased commercially, eliminating the need for disposable seed trays and pots. Moreover, seed blocking reduces seed waste by ensuring each seed is planted with precision, saving money on seed purchases in the long run.

Improved Seedling Health: Seedlings grown in soil blocks tend to experience less transplant
shock compared to those grown in traditional seed trays. The intact soil blocks protect delicate roots during transplanting, resulting in healthier, more resilient seedlings with higher survival rates.

Water Efficiency: Soil blocks retain moisture more effectively than traditional planting mediums, reducing the frequency of watering needed for seedlings. This is especially beneficial for home gardeners who may have limited time for watering or live in regions with water restrictions.

Ease of Transplanting: Transplanting seedlings from soil blocks is straightforward and minimizes root disturbance. Gardeners can simply place the soil block directly into the planting hole, eliminating the need to handle delicate seedlings or disturb their roots. This reduces transplant shock and ensures a smoother transition to the garden bed or container.

Reduced Disease Spread: Traditional seed trays and pots can harbor pathogens and promote the spread of soil-borne diseases. In contrast, soil blocks are less likely to harbor harmful microbes, reducing the risk of disease transmission among seedlings. 

Environmental Sustainability: By reducing the use of plastic pots and trays, as well as minimizing seed and water waste, seed blocking aligns with environmentally friendly gardening practices. Home gardeners can feel good about minimizing their ecological footprint while enjoying the benefits of healthier plants and bountiful harvests.  

Summary: Soil blocking offers home gardeners an array of benefits. With its simplicity and effectiveness, seed blocking is an excellent choice for gardeners looking to maximize their gardening success while minimizing their impact on the environment.    

                SOIL BLOCK RECIPE   

Three Tough Beauties for Your Yard

Choosing the right tree in the Treasure Valley is about more than looks. Our landscapes demand plants that can handle real conditions due to their tolerance for drought, salt, and poor soils, while still providing shade, habitat, and long-term beauty. A great example is the honey locust (Gleditsia triacanthos var. inermis ‘Shademaster’), a thornless tree that balances function and form with ease, with golden color in the fall. Its fine-textured leaves create light, filtered shade that supports lawns and garden beds beneath it, making it an excellent choice for yards where multiple layers of plants need to coexist. It is also relatively low-mess compared to many shade trees, and its dappled canopy helps reduce water stress on turf and understory plantings during peak summer heat. It’s a quiet workhorse that brings both comfort and resilience to the landscape and the edible pulp in its seed pods, which are a food source for wildlife. 

The Treasure Valley climate brings hot, dry summers, cold winters, and alkaline soils that can stress less-adapted species. One way to build resilience into your landscape is to incorporate native trees that are already attuned to our region. Black or Douglas hawthorn (Crataegus douglasii) is a native gem that brings both beauty and backbone to a yard. This small, multi-stemmed tree thrives in irrigated areas or low spots that hold a bit of moisture, making it a great choice for swales, borders, or naturalized edges. 

In spring, it lights up with clusters of showy white blossoms that draw in pollinators, followed by dark berries 
that feed birds and wildlife. Its dense, thorny branches create excellent nesting habitat and can double as a living screen or informal hedge. While it won’t cast deep shade, black hawthorn adds structure, seasonal interest, and ecological value as part of a layered, living landscape. There is a a hawthorn called 'Paul's Scarlet' with striking pink blooms too!

For those with large areas, selecting species that are well-adapted to local conditions means less water, less maintenance, and greater long-term success. The bur oak (Quercus macrocarpa) embodies this principle with its deep roots, drought tolerance, and remarkable longevity. It not only withstands Treasure Valley conditions, but also supports wildlife and adds lasting structure to a landscape. Over time, it can become a true anchor tree, offering shade, habitat, and a sense of permanence that grows with the landscape itself. This is a tree that rewards patience and strengthens the resilience of your yard for decades to come.

When you match the right tree to the right place, you’re not just planting shade, you’re building a resilient Treasure Valley ecosystem from the ground up.

More information is available here:

https://www.blm.gov/sites/default/files/documents/files/NativePlantLandscaping.pdf

Front Range Tree Recommended List

International Society of Arboriculture  

10 Seed Catalogs Every Gardener will want to check out!

Growing flowers and vegetables from seed gives you more choices and saves money. Here are 10 great seed catalogs to check out. Jill Staake writes for and did all the work for us. The green links are live - just click & go. While the winter wind blows, gardeners everywhere turn to seed catalogs as they dream of the spring and summer ahead. The catalogs pile up, dog-eared and tattered, as growers plan for the future. Seed catalogs offer more choices than even the largest garden centers, and growing plants from seed is a great way to save money. We’ve rounded up 10 of our favorite seed catalogs you’ll want to have on hand as you prepare for the growing season. Tip: Want to save paper? All of these companies have websites, and many of them have digital versions of their catalogs.

Prairie Moon Nursery

If you’re dedicated to planting natives in your garden, Prairie Moon should be your go-to resource. They offer an incredibly wide range of wildflowers and grasses, with information about native ranges and growing tips. They sell most seeds by packet or in bulk for larger plantings, as well as bare-root and potted plants for some species. Seeds to Try: Milkweed, multiple varieties. Monarch butterflies need native milkweed throughout their range. Prairie Moon offers a dozen different species of milkweed seeds, covering much of the country.

Request a Catalog 

Select Seeds 

Flower lovers will revel in Select Seeds’ offerings. They specialize in fragrant, old-fashioned blossoms like those that filled your grandmother’s garden. Select Seeds also has rare finds and rediscovered antique heirlooms, like Job’s Tears (Coix lacryma-jobi), one of the oldest grasses in cultivation.

Request a Catalog 

Territorial Seed Company

Veggie lovers, rejoice! Territorial Seed’s catalog has more than 100 pages of vegetable and herb seeds and plants to choose from. Some of their offerings are truly unique, like oak trees inoculated with Bianchetto truffles so you can grow your own fungi delicacies. They also offer flowers and fruits. Seeds to Try: Goldilocks Squash, BuffaloSun Tomato 

Request a Catalog 

Burpee 

Flower and vegetable gardeners will all find something to love in Burpee catalogs. Burpee offers a bit of everything, along with a variety of gardening accessories. Seeds to Try: Royal Purple Radish, Fourth of July Tomato

Request a Catalog 

Baker Creek Heirloom Seeds 

Heirloom seeds provide a direct connection to days past. Baker Creek sells over 1800 varieties of seed, specializing in types from the 19th century and earlier. A look through their catalog feels personal, as many photos include their family or employees showing off their offerings. Seeds to Try: Black Nebula Carrot

Request a Catalog

Johnny’s Selected Seeds 

Johnny’s is an employee-owned company that takes special care to ensure all their seeds meet the Safe Seed Pledge. Their breeders use traditional methods to crossbreed new varieties, so if you’re concerned about GMO, you can trust Johnny’s. They offer a large selection of vegetables and flowers. Seeds to Try: Sun-Fill Purple Sunflower, Goldie Husk Cherry 

Request a Catalog

 

R. H. Shumway’s 

Take a trip down memory lane with R. H. Shumway’s print catalog. Charming black and white drawings illustrate the vegetable offerings, while the flower pages have color illustrations. You can visit their website to see photographs of most varieties before ordering, if you like. Seeds to Try: Pride of Wisconsin Melon 

Request a Catalog

Harris Seeds

Based in Rochester, New York, Harris Seeds has been a resource for gardeners since it was founded in 1879. They now offer a large selection of vegetable and flower seeds, as well as live plants, bulbs, and gardening supplies. Request a Catalog

Park Seed 

Park Seed is one of the biggest names in the business, and they’ve been in business since 1868. They carry an array of flowers, vegetables, plants, and gardening accessories. If you’re new to seed-starting, check out their Bio Dome System, which makes it easy to grow strong healthy plant from seed. Seeds to Try:  Green Twister Coneflower, Honeybaby Butternut Squash Hybrid Request a Catalog

Annie’s Heirloom Seed 

The founder of Annie’s began the company when she realized just how much better heirloom vegetables tasted than commercially grown varieties. She had difficulty finding quality heirloom seeds, so she eventually decided to start her own company. Their carefully sourced seeds come from around the world, with new types added all the time. Request a Catalog

 Sit Back and Dream...