Frost to Hard Freeze: A Gardener’s Guide to Surviving the Fall Chill

As the chill of autumn settles in, it’s crucial to understand the differences between frost, freeze, and hard freeze to protect your precious plants.

Frost: Frost appears when water vapor in the air deposits as ice on solid surfaces. This typically happens when temperatures dip between 33°F and 36°F, especially with light winds. While frost may only cause minor damage, it’s important to note that if the air is dry or the winds are strong, frost can be unpredictable. Mark Longstroth from Michigan State University Extension explains, “A frost is when you see a visible layer of ice, while a freeze is simply when temperatures drop below freezing.” Sometimes, you might even spot frost while the air remains above freezing due to colder surfaces, like your car or roof.

Freeze: A freeze occurs when temperatures drop to 32°F or lower. This can lead to significant damage for many unprotected plants, especially if the freeze lingers for several hours. 

Hard Freeze: When temperatures plunge to 28°F or lower for a few hours, we experience a hard freeze. Unfortunately, this often means the end for many plants and seasonal vegetation.

Black Frost: This occurs when temperatures drop low enough to freeze plants without visible frost. Frozen plants can take on a sad, water-soaked black appearance as they perish.

Wind Freeze: A cold air mass can sweep in, causing temperatures to plummet, even with winds at play.

For gardeners who want to extend the life of their garden, here are some simple actions you can take:

1. Cover your plants. Use frost fabric, sheets, or plastic to shield your plants.

2. Water wisely by giving your plants a drink with warm water to help them stay resilient.

3. Let water run at a gentle trickle for a few days to maintain moisture—just don’t overdo it!
4. Wrap young tree trunks to help insulate them against cold temperatures, preventing freeze damage and maintaining healthier bark during harsh winter conditions.
5. Overwinter potted plants by moving them indoors to a cool, bright location or using a cold frame for protection. Insulate pots with mulch or wraps, group them together for a microclimate, and remember to adjust your watering schedule to prevent rot during the colder months.

For specific timing, check the Idaho Average First Frost Date Map for accurate information tailored to your county.

By taking these steps, you can help your plants brave the chilly weather and thrive until spring returns. Protect your green friends, and enjoy a flourishing garden year-round!

Frogs and Toads in Our Backyard Ecosystems

Have you ever noticed frogs and toads in your garden? Has their population on your property increased or decreased over the years? Frogs and toads play an important role in many ecosystems. Gardeners can take steps to build habitat for frogs which will not only benefit their garden but other species as well.

Frogs control pest populations that carry disease and damage crops. As tadpoles, frogs feed on mosquito larvae. When they develop into frogs, they eat mosquitos and other flying pests. Frogs are considered a keystone species which means they consume many other things, are consumed by other things in the food web, or are linked to other species in various ways. Mammals, birds, insects, and invertebrates are linked to each other within the ecosystem food web by frogs. 

Declining numbers of frogs can adversely affect the food web but home gardeners can take steps to protect their habitats by making simple modifications to their property and garden areas. For example, planting low-lying shrubs or plants will allow frogs to feed while being protected. Leaving native plants on stream banks and protecting wetland areas will improve and, in some cases, increase their available habitat. Also consider making brush piles for amphibians to hide in and installing fishless ponds where amphibians can mate, lay eggs, and develop.

Limiting animal and human access to flowing or contained bodies of water and the surrounding wet habitat, called riparian zones, can also support frog populations. Livestock can contribute to the loss of stream or pondside habitat, so keeping them away can be of great benefit. Cats or other pets who prey on frogs can be kept indoors, especially at night when frogs are feeding. Human-caused pollution on a large scale also affects the ability of frogs to thrive. Environmental temperature changes affect their ability to absorb oxygen and maintain mortality rates in reproduction.

Frogs, toads and other amphibians often indicate the overall health of an ecosystem. If frogs are present, it's likely many factors including pollution, interspecies predation, oxygen levels, etc., are in balance. When amphibians disappear, it's time to figure out what's wrong. Protecting frog and toad habitat will benefit your garden and make a difference to many species in the ecosystem.

Jams, Jellies, Preserves, Marmalades - Yummy!

Fresh, spreadable fruit in the form of jam, jelly, preserves,
or marmalade, might possibly be summer's sweetest reward. The best part is that they are easy to make and can be enjoyed long after you put your garden to bed. So, what is the difference between each of these spreadable options? 

Before we dive in, it helps to know that there are two main factors that turn fruit into a thick, spreadable texture: heat (from cooking) and pectin. When fruit is heated, it will lose liquid, causing the fruit to reduce to a firmer state. Pectin is naturally-occurring in fruit and happens to also make fruit thicken when cooked. However, not all fruit contains enough pectin to reach a firm texture, so many spreadable fruit recipes call for additional pectin.

Jelly:
Jelly is the firmest and clearest of the sweet, spreadable options. The fruit is cooked and strained so only the juice ends up in the final product. Jelly is so firm that you could turn the jar over and slide the jelly out in one solid piece.

Jam:
Jam is a chunkier version of jelly. Jam has more fruit pieces and is slightly looser in texture. Chopped or pureed fruit is cooked with sugar, so pieces of fruit end up in the final product. Jams are not clear and not solid like their jelly cousin. Here's a video for strawberry freezer jam!

Preserves:
Preserves are like jam but contain more and bigger pieces of fruit. Preserves have the least gel-like consistency. They are great for serving with cheeses and meat dishes.

Marmalade:
Marmalade is a preserve, but it is made only with citrus. The whole fruit, rind and all, create a bitter-sweet spreadable delight. Lemon, orange, and grapefruit make great marmalades. Marmalades are aromatic with complex flavors and oils from the citrus peels.

Jam, jelly, preserves, and marmalade start out almost the same, but take different forms depending on how they are processed. Whether you like your fruit a spreadable solid, with small pieces of fruit, with large pieces of fruit, or you want the complex flavors of citrus, there is always something good you can choose to put on your toast.