Climate Change Impacts on Seed Growers

November 2, 2023 Jordan Charbonneau Leave a comment

This past summer, an unprecedented amount of people have felt the effects of climate change. There was flooding in the northeast, wildfires in Canada that spread smoke across the eastern United States, record-breaking summer temperatures, and varying weather patterns. While we can’t say definitely how climate change will affect our local area and business, we do know that we’re already seeing some changes. Here are a few ways climate change is currently affecting seed growers.

High Temperatures

Not long ago, scientists referred to climate change as global warming, as overall, we expect to see an increase in temperature. Today, we call it climate change, as this better represents the scope of changes that will be seen across the globe. However, higher-than-average temperatures are still expected to be part of this change. In the last few years here in Virginia, we’ve seen higher-than-average temperatures across all seasons, including a few record-breaking days.

Increased temperatures during winter may seem enjoyable, but they can also be problematic. Cold winters help to knock back certain pests and diseases. Additionally, some plants actually need a cold period or “cold vernalization.” While we can mimic this for some species by starting their seeds in a freezer or cooler, other plants, like hardneck garlic, need to be grown outdoors where there are consistently chilly temperatures.

High temperatures in spring, summer, and fall can also affect what plants we can grow seeds for or when we can grow them. Many cool weather-loving crops, like English shell peas, fail to produce well when temperatures are higher than average, meaning that we sometimes end up with less seed. High enough temperatures can also prevent crops from flowering or even kill some crops before they can go to seed.

They also affect how well plants are pollinated. If you’ve ever noticed more bees flying around your garden in July in the morning or evening rather than mid-day, it’s the heat. Many pollinators can’t move around and pollinate effectively in high temperatures.

Person on tractor with equipment — Wood Prairie Family Farm Preparing for Fall Cover Crops

Increased Periods of Rain or Drought

While rain is a good thing, there is such a thing as too much of a good thing. Wet fields can spell trouble for farmers trying to get seed in on time. While you sometimes have plenty of wiggle room with crops you plan to harvest as fresh vegetables, crops that need to complete their entire lifecycle and mature seed often require the whole season.

Too much wet, humid weather can also cause trouble during the season too. Wet conditions can increase the occurrence of fungal diseases like powdery mildew. At the end of the season, like in July, August, and September, rain can cause issues again if it rains for long periods on seeds that need to dry out for harvesting.

In an article written by the Guardian, one of our Seed Growers, Jim Gerritsen, owner of the organic Wood Prairie Family Farm in Bridgewater, Maine, shared his experience with growing organic potatoes for seed over the last 40 years. He described how increased rain has lengthened his harvest time. Jim said, “You dig on a Monday. Then on Tuesday, you get an inch of rain, so you’re not digging,” he said. “You take Wednesday to dry out, and then you get back in the field on Thursday; then you get another half-inch rain on Friday. You’re not digging on Saturday because the ground [needs to] dry out, so maybe you don’t get back into the field until Monday.” He needs about 15 good dry days to harvest, but the increased fall rains he has been experiencing now mean those 15 days are often spread out over four or more weeks.⁴

Fire damage to OR 126 McKenzie Highway from the Holiday Farm Fire that came near Adaptive Seeds

Crop Losses from Major Weather Events and Natural Disasters

While our first concern is always the people involved in these intense strategies, it’s important to note that they can profoundly impact seed growers and farmers. In the last few years, we’ve seen several growers experience or narrowly escape a total crop loss due to natural disasters like flooding, wildfires, and hurricanes.

Fires Near and Far

In an interview for Think Out Loud, Sarah Kleeger, the founder of Adaptive Seeds, talks about the tough decisions and work they had to put in when the Holiday Farm Fire approached within 10 miles of their farm in 2020.

She told Think Out Loud that when they knew it was time to evacuate, they took all their seeds with them, which took 8 to 10 pickup and trailer loads. They were allowed and continued to go back to the farm wearing respirators to harvest additional seeds. Thankfully, the farm escaped unscathed, but Sarah said it was an important learning experience about what they may need to do again in the future.³

As some of you may know, wildfires can also take a less sudden toll on crops. Smoke and ash in the sky can prevent crops from getting enough sunlight, causing slower growth. The ash and chemicals in the smoke can also clog plants’ stomata, making respiration and photosynthesis next to impossible.

Flooded Fields

Sadly, Hardwick Vermont’s Riverside Farm, an organic farm just miles from High Mowing Seeds, wasn’t so lucky. When record rainfalls hit Vermont early this summer, their fields, which they’ve been growing on for over 30 years, flooded entirely, and they experienced a total crop loss. Thankfully, the community that values this farm so much has stepped up to help them recover.

While these events may seem scattered, they’re happening with more frequency. While we’re glad both of these farms turned out okay, some may not survive losing an entire season of income. Losing just a single seed grower can also significantly impact small seed companies like SESE, Sow True Seed, High Mowing, or Fedco. This, in turn, affects the availability of seeds for gardeners and farmers and, ultimately, global food production.⁵

Changes for Native and Naturalized Species

Climate change isn’t just impacting the species we grow in our gardens. It’s affecting the plants, fungi, insects, and animals that share these locations with us. As gardeners, we may find that different weeds are present in our gardens or that fewer birds are visiting our yards. So far, one of the most notable changes for gardeners has been the loss of many pollinators and beneficial insects.

Unfortunately, we can already see that climate change is quickly contributing to the decline of insects. Recent studies have shown that 41% of known insect species have declined steeply in the last decade.¹ These species make up the basis of our ecosystems, and many are now facing extinction.

What Can We Do?

Reading about these issues can bring a sense of gloom and hopelessness, yet all is not lost. There are many things individuals can do to improve the plight of seeds.

Save Seed

As a gardener, one of the easiest and best things you can do is to save seed from at least one variety. When you save seed, you’re preserving genetic diversity and helping to adapt an open-pollinated variety to the changing conditions we face.⁶

Support Small Organizations

Small seed organizations need all the support they can get in these troubled times, and they deserve it, too. Many, like Adaptive Seeds, are working hard to adapt and breed varieties that will hold up well in this changing climate. That’s one of the reasons we’ve compiled a list of small seed companies on our website. Though not comprehensive, we’ve included seed growers from the United States’ northern, eastern, and western regions that support social justice causes, sustainability in farming and gardening, and saving your own seed.

Diversify What You Grow

If you cultivate a large plot, whether as a gardener, seed grower, or farmer, now is a great time to diversify. Growing a mix of crops will help lessen the blows when you have rough years with certain crops. Growing a diverse mix will help show you what varieties and traits are best performing in your changing area.

Start a Seed Library

Starting a seed library is an excellent idea if you’re up for some community involvement. In addition to preserving genetic diversity, seed libraries help to revitalize communities, improve food sovereignty, and help adapt seeds to a specific area. Read the Mother Earth News guide to get started with a seed library.²

Climate change is here whether everyone accepts it or not. It’s affecting our farmers and seed growers across the country. Recognizing these changes and doing our best to adapt and preserve seed will help us see a hopefully more stable future.

Resources

1. Daley, Jason. “Insects Are Dying Off at an Alarming Rate.” Smithsonian Magazine, 12 Feb. 2019, https://www.smithsonianmag.com/smart-news/study-shows-global-insect-populations-have-crashed-last-decade-180971474/

2. Conner, Cindy. “How to Start a Seed Library.” Mother Earth News, 18 Aug. 2016. https://www.motherearthnews.com/organic-gardening/seed-libraries-ze0z1608zfol/

3. Hernandez, Rolie. “Climate change affects seed growers.” Oregon Public Broadcasting, 15 Oct. 2021, https://www.opb.org/article/2021/10/15/climate-change-affects-seed-growers/#:~:text=Drought, extreme heat and smoke,and entire losses of crops.

4. Nargi, Lela. “‘No normal seasons any more’: seed farmers struggle amid the climate crisis.” The Guardian, 16 Oct. 2023. https://www.theguardian.com/environment/2023/oct/16/seed-farmers-climate-change

5. Singh, Rishi P, et al. “Impacts of Changing Climate and Climate Variability on Seed Production and Seed Industry.” Science Direct, Birsa Agriculture University, 19 Dec. 2012, www.sciencedirect.com/science/article/abs/pii/B9780124059429000025

6. Van Eendenburg , Hannah. “Seed Saving at the Front Lines of the Climate Crisis.” Green America, greenamerica.org/story/seed-saving-front-lines-climate-crisis. Accessed 1 Nov. 2023.

Garden Advice

Fall Garden Clean-Up: Prepare Your Soil for Spring

October 24, 2023 Jordan Charbonneau Leave a comment

Spring tidying may be the routine for household tasks, but in the garden, a clean-up and refresh is called for in the fall, so the garden is ready to go in spring. These tasks will help keep your garden disease-free, improve and protect soil health, and allow easy spring planting. Follow these steps to properly prepare your soil and tuck in your fall garden.

Clean Up Diseased Crop Debris

An untidy garden isn’t always a bad thing. Plant material naturally decomposes and adds organic matter back to the soil. Flower heads like Rudbeckia, echinacea, and sunflowers provide seeds for songbirds like goldfinches and chipping sparrows. Long plant stems also offer places for solitary bees and beneficial insects to overwinter and lay eggs.

However, leaving diseased or pest-ridden plant material in the garden is always a bad idea. Plant diseases and pests can remain on the material and in the soil over the winter. Remove the material from garden beds and trellises if plants are infected with pests or diseases.

Removing material from crops you know are susceptible to diseases is also a good idea. For example, if you have struggled with blight in the past. You may want to remove all the tomato plant residue even if it appears healthy.

Don’t add pest-ridden or diseased plant material unless you have a very well-maintained compost pile. Compost piles must reach 131°F or higher for at least three days to kill most pathogens.

Avoid Adding Fertilizer

It may seem like you’re getting a head start on spring, but fall is a poor time to add fertilizer to the garden. Fertilizers are generally water soluble and begin breaking down quickly. During winter’s cold temperatures, cover crops or any winter crops you have won’t be able to absorb the nutrients. Much of the fertilizer applied in fall ends up in local waterways, which can cause toxic algae blooms. Wait until spring!

Get Your Soil Tested

A soil test is one of the best ways to start improving your soil. They’re generally quite affordable and tell you precisely what you need. Unfortunately, they often take a while to process. Fall is a great time to test your soil to have the results before the growing season.

Usually, an extension agent can help you interpret your results and guide you on amending your soil. However, you can also check out our Guide to Understanding Soil Tests.

Add Slow-Acting Amendments

Not all amendments act like fertilizer. Dolomite lime, bone meal, rock phosphate, and some other mineral amendments need plenty of time to break down. Using these slow-acting amendments in the fall gives them to incorporate into the soil so that they’re accessible to your plants in spring.

Sow Cover Crops

As you empty beds, you can sow fall cover crops. Cover crops help protect the soil and add nutrients and organic matter. This time of year, you’ll need to focus on hardy crops like Common Winter Rye, Hard Winter Wheat, and Austrian Winter Peas. In zone 7, you can typically sow Austrian Winter Peas and Winter Wheat through October. Rye is the hardiest, and you may be able to sow Rye up to November 15th. Austrian Winter Pea shoots also double as a salad green!

Mulch

Leaving beds bare over the winter is one of the worst things you can do for your soil health! Leaving the soil bare can cause erosion and kill helpful fungi, bacteria, and insects. It’s also a wasted opportunity to continue building up your soil. If you’ve already missed the window for cover crops, it’s time for mulch. A 2 to 3-inch layer of mulch over the soil provides habitat for beneficial insects, adds organic matter as it breaks down, and helps to insulate and protect the soil.

While much of the harvesting is finished, the garden chores aren’t over yet! Follow these fall garden clean-up steps to ensure your soil remains productive and healthy for future seasons.

Garden Advice, Seed Saving

Endless Blooms: How to Save Zinnia Seeds

October 17, 2023 Jordan Charbonneau Leave a comment

Heirloom tomatoes and colorful corn varieties often garner much of the attention when we talk about seed saving, but it’s not just vegetables that have a rich history. Gardeners have saved and selected flower seeds for thousands of years. Zinnias, one of the easiest flowers to grow, are also easy to save seeds from to keep next year’s gardens full of blooms. Learn how to save zinnia seeds in a few simple steps.

Select Good, Open-Pollinated Plants

If you want to save seed, having an open-pollinated variety is best. Varieties can mostly be divided into two categories, hybrid and open-pollinated, with heirlooms falling under the open-pollinated umbrella.

Hybrids are a first-generation cross between two parent varieties. As they are a cross, there’s no guarantee on what their seed will produce next year; they may revert to looking more like one of the parents rather than what you just grew. You can still save seed if you’re okay with a potential surprise.

Open-pollinated varieties are established varieties that produce “true-to-type.” You can save seeds from them year after year with little change unless you select for it. For example, if you only saved seeds from a particular shade bloom.

All of the zinnias we carry are open-pollinated.

The “good” part of this statement is somewhat relative. To start, try to save seeds from plants that have been healthy and vigorous. Avoid diseased plants, as some diseases, like powdery mildew, can remain on the seeds. Then, you can also focus on other characteristics like color, size, or bloom period. Essentially, save seeds from plants you think looked and performed the best in your garden.

Consider Cross-Pollination

If you’ve grown multiple varieties of zinnias, insects may have cross-pollinated them. To achieve pure seed, like what we sell, zinnia varieties need to be isolated by 1/2 mile. However, no rule says you need absolutely pure seed. It’s fine to save seed even if there’s been a little promiscuous pollination; you may get some fun surprise variation from next season’s flowers.

Allow The Flowerheads to Dry

With any seeds, it’s essential to let them fully mature before harvesting to ensure good germination rates. For zinnias, this means that the flower heads, including the petals, should be brown and dry. When this happens, you’re ready to start saving seeds and can cut or pull the flowerheads from the plant.

Process the Flowerheads

First, pull the petals off the flowerhead and set them aside for composting. Some seeds may come off with the petals. Then, rub the flowerhead over a flat surface until it comes apart to release the seeds. The seeds are brown and a bit arrow-shaped. Pick out any extra material you can and set it aside for composting.

Dry Your Zinnia Seeds

Allow your zinnia seeds to air dry on a towel or other flat surface for about one week. This will help ensure they’re fully dry and won’t mold in storage.

Store Your Zinnia Seeds

After they’re fully dry, you can store your zinnia seeds. Place them in an airtight container somewhere cool and dark. Zinnia seeds can last 3 to 5 years if harvested and stored properly.

Be sure to label your container with the variety and the year you harvested your seed. Once you start seed saving, it’s easy to save more, and you’ll need to keep track of your seeds!

Zinnias are easy to grow, and their long bloom period and variety of colors make them an excellent choice for any ornamental or cut flower garden. Saving your own zinnia seeds is simple! It’s also a great way to help steward an open-pollinated variety and save a bit of money. Follow these steps for success with zinnia seeds.

Southern Exposure Seed Exchange