Do Plant Brews Really Work? What the Science Says

If you’ve spent any time on gardening forums or social media, you’ve likely come across homemade plant brews like weed tea, compost tea, banana peel tea, and even eggshell tea or Epsom salts. These DIY fertilizers are praised for being natural, cost-effective, and sustainable—but how well do they actually work? Let’s look at what current research says about these popular garden elixirs.

Weed Tea: Free Fertilizer or Just Funky Water?

Weed tea is made by soaking or fermenting common weeds—such as dandelions, chickweed, or comfrey—in water, with the idea that the nutrients weeds extract from the soil will leach into the liquid and feed your plants. While weeds are nutrient accumulators, there’s little published research confirming the nutrient content or effectiveness of weed tea. Some studies on plants like Tithonia diversifolia (Mexican sunflower) used as green manure show benefits when incorporated directly into soil, but not as fermented teas. At best, weed tea may provide a mild boost, but results are unpredictable and largely anecdotal.

Compost Tea: Some Scientific Backing

Compost tea, particularly the aerated kind (ACT), is one of the most researched DIY fertilizers. It’s made by soaking compost (plant-based or worm castings, not always manure) in water, sometimes with added sugars and oxygen to increase microbial growth. Studies have found that compost tea can improve microbial life in soil, help suppress certain plant diseases, and occasionally increase plant growth. However, its success depends on how it’s brewed and applied. Using fully matured, pathogen-free compost is key, especially when used on edible crops. While compost tea shows promise, it’s not a substitute for nutrient-rich compost or balanced fertilizers.

Banana Peel Tea: Some Promise, If Processed Properly

Banana peels are high in potassium and other minerals. Recent studies suggest that processed banana peel fertilizers can improve soil quality and plant growth. For example, a 2024 review published in the journal Agriculture by MDPI discusses the potential of banana peel-based biofertilizers and their effectiveness when properly processed. Other studies support their use in nano-fertilizer or composted forms for boosting yields and plant health. That said, soaking banana peels in water for a few days may not extract meaningful nutrients. Composting them is a far more effective way to return their value to the soil.

Eggshell Tea and Epsom Salts: Popular, but Situational

Eggshell tea is made by soaking crushed eggshells in water to extract calcium. While eggshells are rich in calcium carbonate, it breaks down slowly. Studies show that unless finely ground, eggshells don’t readily release nutrients into water or soil. Composting or grinding them into powder is more effective. Epsom salts (magnesium sulfate) are also frequently used, especially for tomatoes and peppers. While magnesium is an essential nutrient, overuse can disrupt soil nutrient balance. Unless a soil test shows magnesium deficiency, regular use isn’t necessary and may cause harm.

The Bottom Line: Good Garden Practices First

DIY fertilizers like weed tea, compost tea, banana peel tea, eggshell tea, and Epsom salts can be part of a sustainable gardening routine. However, their effectiveness varies widely, and most are only mildly beneficial unless processed and applied properly. Before adding any homebrew fertilizer to your garden, remember: healthy plants start with healthy soil. Compost and organic matter are your foundation. Always test your soil before adding amendments, it’s the only way to know what your plants actually need. Use DIY fertilizers as supplements, not substitutes, for a well-balanced approach.

Welcome Wildlife with These Attractive Bushes & Trees!

We all feel it—the desire to try harder to coexist with nature. When choosing a new tree for our landscape, we want something that will provide us with shade and beauty plus provide nourishment for our birds and pollinators. We are highlighting three attractive trees that grow well in the Treasure Valley. Each of these deciduous trees are small enough to fit in most yards. They boast beautiful spring blossoms, colorful fall foliage, wonderful fragrance, and bright, edible berries. 

Saskatoon Serviceberry (Amelanchier alnifolia) is a delightful landscape tree, and a favorite among birders in the Treasure Valley. Birds of all kinds flock to the Serviceberry in the summer for the sweet, juicy, red fruit. The berries are edible for humans too, tasting somewhat like blueberries! Billowing white blooms attract bees and butterflies in the spring. When fall arrives, the foliage turns a beautiful, deep red. Hardy in zones 4-9, the Serviceberry tolerates most soil types once established It grows quickly up to 25 feet and prefers full sun.

Choose the Chokecherry (Prunus virginiana ‘Canada Red') tree or shrub if you're looking for something showy that will grow in rather poor conditions. This hardy little 20 to 25-foot tree tolerates heat, cold, wind, and poor soil in zones 2-10. Even though it asks for little, it will grow beautiful clusters of long, white flowers in the spring, attracting butterflies and other pollinators. Each new flush of bright green leaves turns reddish purple by mid-summer, providing striking color throughout the growing season. As the name implies, chokecherries taste bitter to humans when raw, but the fruit can be used to make wines, syrups, and jelly. You’ll have to act fast, though, if you want some for yourself! Birds love to feast on this important and nutritious food source. The leaves and berry seeds are toxic to humans and animals, so do not plant this tree if you have pets that might ingest the seeds or foliage.

A classic in Idaho landscapes, the Crabapple(Malus spp) never fails to delight our winter-weary eyes with its masses of pink flowers in early spring. This outstanding tree thrives in full sun and acidic soil but is quite adaptable to other conditions and is hardy to zone 4. The Malus ‘Indian Summer’ variety has excellent resistance to disease. Crabapples trees are a wildlife magnet. The bright-red fruit remains on the tree from fall through winter as a welcome, nutritious treat.

Martin Luther once said, “Even if I knew that tomorrow the world would go to pieces, I would still plant my apple tree.” 

There is never a better time than now to choose a tree and plant it. Even a small yard can attract birds, butterflies, and helpful insects, benefiting us all for years to come.

With Thrill, Fill, Spill - Container Gardening May Be your Answer!

Want to add color to your landscape without fighting Idaho’s heavy clay soil?

Container gardening may be the answer! More than just for areas with limited space, containers are great for adding height in an existing garden, as a way to plant areas with difficult in-ground soil conditions, or as a portable home for plants that cannot survive the winter months outdoors. They also allow gardeners an opportunity to experiment with combinations of colors and textures on a small scale before taking on a bigger planting.

Additionally, I use container gardens within my own landscape in order to create visual levels of plantings within my border, as well as an alternative to battling digging out and amending the hard clay soil.

Key considerations when gardening in containers: 

1. Location: When determining where to place your containers, it is important to consider the amount of sunlight the location gets during the day. 

2. Container: Containers should have adequate drainage and not be too much larger in size (around) than the combined area needed for the plants that will be planted in the container.

3. Soil: The soil should be mostly a potting soil mix, that can be amended with organic material (compost, peat moss). When adding material to the potting soil, the soil and organic material should be well combined in order to have a uniform texture and allow for proper drainage. 

4. Plant selection: Based on the amount of sun that the container will get during the day, select plants that have similar amounts of sunlight and water required. 

5. For plant recommendations and ideas, check out this article from Oregon State University.

How to Design a Container Garden:

Designing a container garden lets the gardener be free to create playful and eye-catching garden spaces. 

The primary design elements of a container garden are the thrill, fill, and spill. 

1. The thrill is usually a planting that creates height in the container, it is a planting that is often centered in the container and is taller than the rest. 

2. The fill is a plant or plants that are similar in height, but shorter than the thrill. The fill occupies the middle section of the container planting and may have pops of color contrast that draw the eye toward the container. 

3. The spill is typically a trailing plant that spills over the side of the container and adds both drama and texture.   

Trying to decide which is right for you - container gardening or raised beds? Check out these five tips.

From Indoors to Outdoors: How to Start Melons, Squash, and Pumpkins for a Perfect Transplant

As winter fades and spring temperatures rise, mid-April is the ideal time to prepare for warm-season crops like squash, melons, and pumpkins. While it is still too early to plant them directly outdoors, taking steps now will ensure a strong start to the growing season.

Since squash, melons, and pumpkins thrive in warm soil (60–70°F), starting them indoors 3 to 4 weeks before your last frost date provides a head start. The University of Idaho Extension recommends this method to establish strong plants before transplanting.

These crops do not like their roots disturbed, so careful handling during transplanting is essential. To minimize stress, peat pots or other biodegradable containers are recommended.

Seed Starting Steps:

✔ Containers: Peat pots or biodegradable pots reduce root disturbance during transplanting. If plastic containers are used, seedlings should be handled gently.
✔ Soil: A light, well-draining seed-starting mix promotes healthy root development.
✔ Temperature: Soil should be kept at 75–85°F for optimal germination. A heat mat can help maintain consistent warmth.
✔ Lighting: Grow lights should be positioned 2–3 inches above seedlings for strong, compact growth.
✔ Watering: Soil should remain moist but not soggy to prevent disease.

Seeds should be planted 1 inch deep, with 1–2 seeds per pot. Once seedlings emerge, thinning to one strong plant per pot will ensure healthy growth.

Preparing the Garden Bed

While seeds germinate indoors, garden beds should be prepared for transplanting in mid-to-late May. The University of Idaho’s vegetable gardening guide highlights the importance of well-drained, nutrient-rich soil and full sun exposure for these crops. 

Soil Preparation Steps:

✔ Remove weeds to prevent competition.
✔ Loosen soil and incorporate compost for improved fertility.
✔ Rake soil smooth and ensure good drainage.

Since squash, melons, and pumpkins are heavy feeders, preparing the soil early allows nutrients to integrate before transplanting.

Mulching Plan: A Natural Approach

Mulch helps retain moisture, suppress weeds, and regulate soil temperature while protecting delicate roots from disturbance. Consider using one or a combination of the following:

• Compost (1–2 inches): Feeds soil and improves structure.
• Shredded leaves or dried grass clippings (2 inches): Insulates and holds moisture.
• Straw or hay (3 inches): Prevents rot by keeping fruit off the soil.

Choose the best option for your garden, or layer multiple types for added benefits.

Looking Ahead: Preparing for Transplanting

Since squash, melons, and pumpkins do not like their roots disturbed, extra care must be taken when transplanting. When moving plants outdoors, the entire peat pot should be planted directly into the soil to avoid disrupting the roots. If plastic trays were used, seedlings should be gently removed and transplanted with as much of their root system intact as possible.

A week before transplanting, seedlings should be hardened off by gradually introducing them to outdoor conditions, starting with a few hours each day in a sheltered location.

With seeds started indoors and garden beds prepared, everything will be in place for a successful growing season. Careful transplanting will ensure these plants establish quickly, leading to a productive harvest of squash, melons, and pumpkins by late summer.

Three Bumble Bees of Idaho

Bees are vital to Idaho's ecosystems and agricultural economy, serving as key pollinators for crops, wild plants, and native vegetation. The Treasure Valley, with its fertile soils and ideal climate, is home to both wild and managed bee populations that play an essential role in maintaining biodiversity and ensuring agricultural productivity. From honeybees to native species, these pollinators are crucial for supporting crops such as fruits, vegetables, and seeds, making them indispensable, to the region's farmers and gardeners. Protecting and encouraging healthy bee populations is vital not only for Idaho’s agricultural success but also for preserving its diverse natural habitats.

Idaho's landscapes host a variety of bee species. Three of the over twenty species of bumble bees that have been observed in various regions of Idaho on a myriad of plants are summarized below.

Red-Belted Bumble Bee
(Bombus rufocinctus)
This beauty thrives in higher elevations, such as the Northern Rockies and Idaho Batholith, foraging on plants like lupines, sweet clover, and knapweed. It is a significant pollinator in meadows, forests, and shrublands.
 

Hunt’s Bumble Bee 
(Bombus huntii)

The Hunt’s Bumble Bee is highly adaptable, thriving in diverse habitats such as riparian zones and shrublands, often visiting flowers like teasel and lupine.
 

Morrison Bumble Bee 
(Bombus morrisoni)

This Bumble Bee is found in grasslands, sagebrush steppes, and even urban parks, where it pollinates a wide range of flowering plants including milkweed, thistle and bee balm. The Morrison Bumble Bee population has been in decline in recent years and the monitoring of it is of particular interest. 

Supporting Idaho’s bee populations requires community action. Planting native flowers, creating pollinator gardens, reducing pesticide use, and preserving wild habitats are essential steps to help bees thrive. Small efforts, like planting diverse flowers in urban areas or leaving natural spaces untouched, can significantly impact the survival of these pollinators. By fostering environments that support healthy bee populations, we not only contribute to agricultural productivity but also sustain the natural beauty and biodiversity of Idaho. For more information on creating pollinator-friendly spaces, visit Creating Bee Habitat in Idaho or Planting a Bee Garden. Together, we can ensure that Idaho’s bees—and the ecosystems they support—thrive for generations to come.

I want a fruit...& maybe a nut tree - Now What?

 Selecting fruit trees to grow in your yard or orchard depends on several factors:  available space, height and width restrictions, soil type, exposure to good light and air circulation, preferred type of fruit, type of root-stock, and much more. 

The first step is to plan. 

·         The following factors should be considered as you plan: 

• Climate zone
• Soil type and pH
• Location and surrounding landscaping
• 
  Drainage
• Overhead restrictions (power lines, other trees, shading)
• Width restrictions (fences, buildings property lines)
• Underground restrictions (sewer/power/telephone lines, septic tanks or drain fields, layers of poor soil, wells)
• Irrigation and fertilizing
• Time needed for tree care
• Pruning
• Harvesting
• Spraying

Selection of the trees is one of the most important steps. 

There are several great resources to help you select a tree for your yard.

The Pacific Northwest Handbooks publication EC 819, Growing Tree Fruits and Nuts in the Home Orchard  The Treasure Valley is Area II in this publication.

Other factors to consider are: 

•          Choose a reliable nursery with appropriate stock selected for this area
•          Choice of fruit
•          Varieties of chosen fruit that grow best in this region 
•          Dwarf or semi-dwarf root stock
•          Bare root, ball and burlap (B&B), or containerized stock
•         Need of a pollinator or self-pollinator,
•          Blooming and harvest times
•          Pests – insects, birds, or disease resistant

To maintain a strong tree or orchard, time must be given towards tree health.   There are numerous publications from Extension Services through the University of Idaho, Washington State University, and Oregon State University to assist you with your specific trees.

https://youtu.be/_YqQPtsC-eA

The following are important items to consider toward maintaining a vigorous home fruit tree:

•          Training of tree branches
•         Thinning and pruning
•          Irrigation needs
•          Fertilization needs
•          Insect and disease control
•          Weed 
•          Rodent control

A backyard fruit tree or orchard is a wonderful addition to your landscaping.  Be sure to choose trees that are compatible to your region, soil, and property.  With the proper selection, you can enjoy fruit from your backyard trees for many years to come.                                 

Using protective clothing: A key to safe gardening

Gardening can be very rewarding. Not only is it a great form of exercise, but when done correctly, it can also provide delicious food, beautiful surroundings, and a true sense of accomplishment. However, gardening comes with risks. Knowing how to protect yourself is essential for an enjoyable and safe experience. One of the best ways to stay safe is by wearing the right protective clothing. Proper gear can help prevent injuries caused by exposure to pesticides, the elements, and common gardening hazards.

Protection from Pesticides

Exposure to pesticides can be harmful to your health. Since 90% of chemical exposure occurs through skin contact, wearing protective clothing is crucial when handling pesticides. To minimize risk, wear chemical-resistant gloves, a long-sleeved shirt tucked over the gloves, long pants over unlined rubber boots, safety glasses with side and brow shields, and a wide-brimmed rain hat or hooded raincoat. These precautions help reduce harmful exposure and keep you safe. 

Protection from the Elements

Proper clothing can also protect you from extreme weather conditions. Heat exhaustion and sunburn, for example, can be significantly reduced by wearing garments made from tightly woven, quick-drying, and sweat-wicking fabrics. Choose loose-fitting, lightweight, and light-colored clothing made of synthetic blends rather than cotton, silk, or linen, as these fabrics absorb moisture and trap heat. Protect your feet with polyester blend socks, wear a wide-brimmed hat, and use UV-protective sunglasses to shield yourself from the sun’s intense heat and harmful rays.

Protection from Common Gardening Hazards

Proper clothing choice can help prevent injuries while performing everyday gardening tasks. Uneven or unstable terrain, sharp tools, and bites or stings from insects and other critters can all pose risks. To better protect yourself, wear a long-sleeved shirt, long pants, a proper hat, boots with good tread and foot support, safety gloves, safety glasses, and hearing protection. When working with chemicals or in dusty environments, consider wearing a mask that covers your nose and mouth. 

While it may take some planning and effort, wearing proper protective clothing can make the difference between a successful gardening experience and a painful one. Making it a routine practice ensures both safety and enjoyment in the garden