Seeds & starts

The prettiest catalog is not the best catalog. A variety bred and trialed hundreds of miles away can carry a "days to maturity" number that simply does not hold in another climate, and the seed is not at fault; it was selected under different heat, daylength, and disease pressure. The strongest seed supply is almost never one company. It is a mix: a catalog for volume, a local nursery for the two or three crops that are hard to raise indoors, and a swap or a neighbor for whatever has already proven itself on your street.

For heirlooms and regional stuff, Baker Creek Heirloom Seeds, Seed Savers Exchange, Southern Exposure Seed Exchange, and Fedco all do good work. If you're north and short-season, High Mowing Organic Seeds and Johnny's Selected Seeds run trials in Vermont and Maine, so their days-to-maturity numbers are honest for cold country. Native Seeds/SEARCH carries Indigenous and Southwest-adapted varieties you won't find anywhere else. Worth a look even if you're not in the desert, because their drought tolerance work is just good genetics.

Don't sleep on the boring options. Feed and farm-supply stores stock regional favorites cheap, no shipping, no fuss. Seed libraries let you borrow for free and pay it back with saved seed later. Most county library systems have one now. And a Master Gardener plant sale in May will hand you a tomato variety that's been surviving your county's blight and heat for a decade, for two bucks a start.

A seed packet is a tiny instruction manual that most people never actually read past the front. The front sells you the fantasy. The back has the number that matters: days to maturity. For direct-sown crops that's sowing to harvest. For anything transplanted (tomatoes, peppers, eggplant) it's transplant to harvest, so tack on another 5-8 weeks of indoor growing before that clock even starts.

Germination temperature means soil temperature, not air temperature, and that distinction ends more spring plantings than frost does. Lettuce germinates fine at 40°F soil. Beans want 60-70°F minimum or the seed rots in the ground before it sprouts, which is why a row of cold-soil beans often comes up as scattered blanks. Tomatoes and peppers germinate fastest at 75-85°F, which is why a heat mat under the tray matters more than any grow light. A soil thermometer costs about $12 and settles the question in one reading.

Seed count math matters more than gardeners think. A gram of lettuce seed is roughly 800-1,000 seeds; a gram of tomato seed is closer to 300; a gram of beans is maybe 3-5 seeds because they're huge. If a packet says 80% germination and 100 seeds, expect about 80 usable plants, sow 2-3 per hole, and thin hard. Thinning is not optional. Crowded seedlings compete for light, get leggy, and rot at the base from poor airflow. Depth is non-negotiable too: bury a lettuce seed a half inch and it'll never see daylight, it just runs out of stored energy underground.

Open-pollinated means the plant is pollinated naturally (bees, wind, or itself) and its offspring resemble the parent. Heirloom is a cultural label stacked on top of that: an open-pollinated variety passed down, usually 50 years or more, often carrying a family or place name. 'Mortgage Lifter' has a story. So does 'Cherokee Purple.' The flavor can be extraordinary. The disease resistance often is not, because these lines were selected for taste and keeping in a household, not for blight resistance in a monoculture.

Hybrid seed (F1) comes from deliberately crossing two distinct parent lines to combine their traits: vigor, uniformity, disease resistance. Hybrid seed can be saved, but the next generation will not breed true; it segregates back toward the grandparents in unpredictable ways. Where seed saving and seed sovereignty are the goal, open-pollinated and heirloom varieties are the ones that keep that door open, and every packet saved is one less line of your food supply that depends on a company still stocking it.

Genetically engineered (GE, commonly called GMO) seed has DNA altered through laboratory techniques rather than breeding. In the US, GE varieties dominate commodity corn, soy, cotton, canola, and sugar beet, and there is no federal requirement that seed be labeled as engineered (Center for Food Safety; NC State Extension). Home garden vegetable seed has historically been almost entirely conventional, but that is changing: the GE Purple Tomato from Norfolk Plant Sciences was released directly to US home gardeners in 2024. So the honest position is not "stop worrying" but "know what you are buying." If avoiding engineered seed matters to you, buy certified organic (which excludes GE by regulation), buy from a company listed on the Safe Seed Pledge database, or grow from seed you saved yourself. Those are real, verifiable safeguards, and choosing them is a legitimate decision about your own food, not a hedge against an imaginary risk.

Two things worth caring about regardless of that debate. First, seed treatments: much conventional seed is coated with fungicides or insecticides, and some nursery starts are drenched with systemic neonicotinoids that persist in pollen and nectar. Treated seed is usually dyed a bright pink, blue, or green, and the packet or bin tag names the product. Untreated and organic seed avoid it entirely. Second, provenance: knowing who bred and grew your seed, under what conditions, and whether the people who did it were paid fairly is part of ethical sourcing, and small regional houses and Indigenous-led seed keepers are usually the ones who will tell you.

Starting indoors buys you season length and lets you grow varieties no nursery stocks. The number one failure is light. A south window looks bright to your eyes but it's a fraction of what a seedling needs, and they'll stretch toward it, going thin and weak within a week. A basic LED or fluorescent shop light, $30 at a hardware store, hung 2-4 inches above the leaves and run 14-16 hours a day beats any window, full stop.

Use seed-starting mix, not garden soil and not straight potting soil either. Garden soil compacts in cells, may carry disease, and comes loaded with weed seed. Seed mix is light, sterile-ish, and holds even moisture. Bottom-water by setting trays in a shallow pan so you don't blast tiny seeds sideways, and hold off on fertilizer until the first true leaves show. The seed itself carries enough food until then.

Damping-off is the seedling killer nobody warns you about early enough: a fungal rot that collapses stems right at the soil line overnight, usually from overwatering, poor airflow, and cool soggy mix. Prevention beats cure. Use fresh sterile mix, don't overwater, run a small fan for airflow, and don't crowd trays. Timing: tomatoes and peppers 6-8 weeks before last frost, brassicas and onions 8-10 weeks, squash and cucumbers only 3-4 weeks because they hate root disturbance and will sulk if held too long. Harden off before transplanting. An hour outside in shade the first day, building to a full day of sun and wind over 7-10 days, or you'll watch the leaves bleach and burn within hours of planting out.

Root crops especially resent transplanting: carrots, radishes, beets, and turnips grow a taproot that forks and stunts if disturbed even once, so they go straight into the ground or not at all. Beans, corn, squash, cucumbers, peas, and most greens also do fine or better sown directly. Save your trays for the crops that actually need the head start.

Soil prep is the real lever. Loose, crumbly soil (the texture of chocolate cake crumbs, no clods) lets a hypocotyl push through without wasting energy. Clear rocks and thick mulch off the seedbed surface until plants are up and growing; mulch is for after emergence, not before. Press big seed like beans and squash firmly into contact with soil, but don't pack the surface into a crust or it'll seal against water and air both.

Go by soil temperature, and succession-sow instead of emptying the whole packet at once. A smaller planting every 1-3 weeks keeps lettuce and beans coming steadily instead of one glut nobody can eat fast enough followed by three empty weeks. Mark rows clearly with a stake and string: an unmarked seedbed is easy to hoe through before the crop emerges, and slow germinators like carrots and parsnips are the usual casualties.

Seed saving closes the loop. A plant grown and saved on your own ground adapts, generation over generation, to your specific soil, pests, and weather quirks. It also means you're not re-buying the same packet every spring. Start with self-pollinating crops that have big, easy seed: beans, peas, lettuce, and tomatoes forgive beginner mistakes.

Choose your seed parents deliberately. Save from the earliest, healthiest, best-tasting plant in the row, never the runt that happened to have extra seed left over. Cross-pollinating crops need real isolation or hand-pollination: squash varieties will cross with each other within a quarter mile if bees are working both, corn crosses via wind over even longer distances, and brassicas (all of which are one species, Brassica oleracea, for cabbage/kale/broccoli/brussels sprouts) cross with abandon. Self-pollinators like beans and tomatoes need far less. A few feet of separation and maybe a floating row cover during flower if you're precise about purity.

Wet-seeded crops: tomatoes, cucumbers, melons. Carry a gel sac around the seed that both inhibits germination and can harbor seed-borne disease, so they need fermentation. Scoop pulp and seed into a jar with a splash of water, let it sit 2-3 days at 70-80°F, stirring once daily; a layer of mold on top is normal and means it's working. Rinse in a strainer until the seed feels gritty clean, then dry on a coffee filter or screen, not paper towel which glues to the seed. Dry-seeded crops: beans, peas, lettuce, brassicas, just finish drying on the plant, then get shelled or threshed and dried further indoors. Either way, finished seed should snap when bent, not fold, before it goes in an airtight jar in a cool dark place. A spoonful of dry rice or a silica packet in the jar keeps ambient humidity from creeping in.