Growing Peas: A Complete Profile
By Growing Home Greens Team · July 18, 2026
Peas are one of the few crops meant to go in the ground while it’s still cold, direct-sown weeks before your last frost, while most of the garden is still just a plan on paper. They’re also one of the few nitrogen-fixers in a typical vegetable bed, quietly benefiting whatever gets planted near their roots.
Sowing it into soil most crops would sulk in
Direct-sow seeds an inch or two deep about 6 weeks before your last frost. Peas want the cold and will germinate in soil most other crops would sulk in. Most varieties climb, so give them a trellis, netting, or fence from the start rather than trying to add support after the vines are already sprawled across the ground. At 8 plants per square foot, they’re dense but shallow-rooted, which is part of why they pair well with deeper-rooted crops nearby.
Mildew that shows up as the season warms
A powdery white coating on the leaves late in the pea season is powdery mildew. It tends to show up as the weather warms, which is one of the reasons pea season is naturally short in most climates. Poor pod set usually traces back to heat: peas stop setting pods reliably once temperatures climb, so a late planting often trades yield for a longer window.
A nitrogen source that needs a trellis
Peas fix nitrogen that benefits neighboring root crops like carrots. See the full companion guide for peas. Keep them away from onions, garlic, leeks, and chives, all of which inhibit the nitrogen-fixing bacteria peas depend on. Because peas need vertical support, plan their spot in the Garden Designer along a fence line or trellis rather than out in open bed space where a cage would have to be added later.
Companion planting guide for Pea · Find your planting dates
Typically viable in USDA zones 2-11. Not sure your zone? Look it up by ZIP code.
Method: Direct sow: Direct-sow outside. Pea doesn't transplant well, or doesn't need the extra time indoors.
See exact start-indoors, direct-sow, and harvest dates for your zone →
How many Pea plants fit per square foot?
Spacing: 8 per square foot (square-foot-gardening spacing). Mature height: 3-6 ft.
Soil & water: pH 6-6.5. well-drained. Amend with lime if soil pH falls below 6.
Varieties worth considering
- Cascadia (snap pea): Cornell's disease-resistant vegetable variety list credits Cascadia with resistance to common wilt, fusarium wilt, pea enation mosaic virus, pea/bean leaf roll virus, and powdery mildew, a broadly resistant option worth considering if mildew has been a recurring problem in your peas. (source)
- Green Arrow (shelling pea): Cornell's list credits it with the broadest resistance profile among shelling types: curly top virus, common wilt, downy mildew, fusarium wilt and powdery mildew all at once. The pick if you want traditional shelling peas rather than an edible-pod snap type like Cascadia. (source)
- Sugar Snap (snap pea): The original snap pea, per Cornell resistant to common wilt and fusarium wilt. Narrower resistance than Cascadia, but it's the variety that started the whole edible-pod-snap category and remains a widely available default. (source)
Cited from the source shown next to each variety. We haven't grown these ourselves yet, so treat this as a research-backed starting point, not a personal endorsement.
Where to buy pea seeds
As an Amazon Associate we earn from qualifying purchases. Some links on this page also go to other retailers we may earn a commission from as an affiliate, at no extra cost to you. We only recommend products with a genuine consensus of positive, independent reviews. See the sources cited on each item.
See it growing
Search YouTube for "growing pea" videos → (a live search, not a hand-picked video; results vary and aren't vetted by us)
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Growing Pea: A true cold-season crop, sown weeks before your last frost while the rest of the garden is still waiting.
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