Snap Pea 'Cascadia'
Pisum sativum 'Cascadia'
An award-winning snap pea variety that combines exceptional disease resistance with outstanding flavor and productivity. Developed specifically for home gardeners, Cascadia produces crisp, sweet pods that are perfect for fresh eating and maintain their quality longer than most varieties. This reliable performer thrives in Pacific Northwest conditions but adapts well to gardens everywhere.
Harvest
60-70d
Days to harvest
Sun
Full sun to partial shade
Zones
2–11
USDA hardiness
Height
12-18 inches
Planting Timeline
Showing dates for Snap Pea 'Cascadia' in USDA Zone 7
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Snap Pea 'Cascadia' · Zones 2–11
Growing Details
Zone-by-Zone Planting Calendar
| Zone | Indoor Start | Transplant | Direct Sow | Harvest |
|---|---|---|---|---|
| Zone 3 | — | — | May – June | July – October |
| Zone 4 | — | — | April – June | June – October |
| Zone 5 | — | — | April – May | June – November |
| Zone 6 | — | — | April – May | June – November |
| Zone 7 | — | — | March – May | May – November |
| Zone 8 | — | — | March – April | May – December |
| Zone 9 | — | — | February – March | April – December |
| Zone 10 | — | — | January – March | March – December |
| Zone 1 | — | — | June – July | August – September |
| Zone 2 | — | — | May – July | July – September |
| Zone 11 | — | — | January – February | February – December |
| Zone 12 | — | — | January – February | February – December |
| Zone 13 | — | — | January – February | February – December |
Succession Planting
Direct sow Cascadia every 14–18 days starting around March 1 in zone 7, and plan to stop by late April — once daytime highs are consistently above 80°F, pod set drops off sharply and the vines decline fast. That gives you two to three successions in the spring window. For a fall run, count back 70 days from your first expected frost (typically mid-November in zone 7) and sow again around late August to early September; if soil temps are still above 85°F, wait for a cooler stretch before putting seed in the ground or germination will stall.
Complete Growing Guide
Start preparing your planting site in late winter by working compost or aged manure into the soil. Cascadia snap peas thrive in loose, well-draining soil with a pH between 6.0-7.0. If your soil is heavy clay, consider building raised beds or adding perlite to improve drainage, as waterlogged conditions can lead to root rot.
Direct sow Cascadia seeds 2-4 weeks before your last frost date when soil temperatures reach 45°F. Plant seeds 1-2 inches deep and 2-3 inches apart in rows spaced 18 inches apart. Unlike some pea varieties, Cascadia doesn't require pre-soaking, though overnight soaking can speed germination in cooler soils. Install your support system at planting time – these vigorous climbers reach 6-8 feet and need sturdy trellises or netting.
Skip starting seeds indoors, as peas transplant poorly and direct-sown plants quickly outperform transplants. For continuous harvest, make succession plantings every 2-3 weeks until 10 weeks before your first fall frost.
Fertilize lightly at planting with a balanced fertilizer, then side-dress with compost when plants begin flowering. Avoid high-nitrogen fertilizers which promote leaf growth at the expense of pod production. As legumes, peas fix their own nitrogen once established.
Maintain consistent soil moisture, especially during flowering and pod development. Water at soil level to keep foliage dry and prevent disease. Mulch around plants to retain moisture and suppress weeds, but keep mulch away from stems.
Common mistakes include overwatering (leads to root rot), planting in hot weather (Cascadia stops producing when temperatures exceed 75°F), and harvesting pods too late (they become tough and starchy). In zones 7-9, plant again in late summer for a fall crop when temperatures cool.
Harvesting
Begin harvesting Cascadia snap peas 60-70 days after planting when pods are plump but still bright green and glossy. The ideal pod should be 3-4 inches long with visible pea shapes inside, but walls should still snap crisply when bent. Test readiness by gently pressing the pod – it should feel firm but give slightly, not hard or squishy.
Harvest in early morning when pods are crisp and full of moisture. Hold the vine steady with one hand while pinching or cutting the stem with your other hand, leaving a short stub. Avoid pulling pods off, which can damage the plant and reduce future production.
Pick pods every 2-3 days once harvest begins, as leaving mature pods on the vine signals the plant to stop producing. Cascadia maintains its quality longer than most varieties, giving you a wider harvest window, but don't wait too long – overmature pods become fibrous and lose their signature sweetness.
Storage & Preservation
Store freshly harvested Cascadia snap peas unwashed in perforated plastic bags in the refrigerator crisper drawer. They maintain peak quality for 5-7 days, longer than most snap pea varieties thanks to Cascadia's bred-in storage traits. For best flavor and texture, consume within 3 days of harvest.
For freezing, blanch whole pods in boiling water for 2 minutes, then immediately plunge into ice water. Drain thoroughly and freeze in airtight containers for up to 8 months. Cascadia's thick pod walls make it excellent for freezing – pods retain their snap better than thin-walled varieties.
Dehydrate snap peas into crispy snacks by cutting lengthwise and drying at 125°F for 8-12 hours until completely crisp. Store dried peas in airtight containers for up to 6 months. Fresh pods also pickle well in light vinegar brines, maintaining their crunch for 2-3 weeks refrigerated.
History & Origin
Cascadia snap pea was developed by Dr. James Baggett at Oregon State University in the 1980s as part of a breeding program focused on creating disease-resistant peas for the Pacific Northwest's challenging growing conditions. Released in 1987, this variety was specifically bred to resist powdery mildew and pea enation mosaic virus, two diseases that plagued home gardeners in the region's cool, moist climate.
The variety's name honors the Cascade mountain range that defines the Pacific Northwest landscape. Baggett crossed multiple parent lines to achieve Cascadia's unique combination of disease resistance, extended harvest window, and superior pod quality. The variety quickly gained recognition beyond its intended region, earning an All-America Selections award for its outstanding performance in diverse growing conditions.
Cascadia represents a shift in pea breeding philosophy – instead of focusing solely on commercial production traits, breeders began prioritizing characteristics that mattered to home gardeners: reliable disease resistance, extended harvest periods, and superior eating quality straight from the garden.
Advantages
- +Exceptional resistance to powdery mildew and pea enation mosaic virus, two common pea diseases
- +Extended harvest window with pods maintaining quality longer than most varieties
- +Performs reliably in cool, moist Pacific Northwest conditions while adapting well nationwide
- +Vigorous climbing habit reaches 6-8 feet, maximizing production in small spaces
- +All-America Selections winner with proven track record across diverse climates
- +Pods retain crispness and sweetness even when slightly overmature
- +Strong stems resist breaking under heavy pod loads
Considerations
- -Requires sturdy 6-8 foot support structures due to vigorous climbing habit
- -Production slows significantly in temperatures above 75°F
- -Seeds cost more than open-pollinated varieties as a hybrid
- -Cannot save seeds for next season due to hybrid nature
- -Takes longer to mature (60-70 days) compared to some early varieties
Companion Plants
Carrots and radishes are the most practical neighbors — they work different depths (radishes loosening the top 6 inches, carrots going 8–12 inches down), so root competition is essentially zero. Lettuce and spinach fill the gaps between pea rows without crowding, and in our zone 7 Georgia garden all four of these cool-season crops are running on the same March–May schedule anyway. Marigolds and nasturtiums draw aphid predators like parasitic wasps into the bed. Keep onions and garlic on the other side of the garden — alliums release compounds that interfere with the Rhizobium bacteria Cascadia depends on for nitrogen fixation, and gladiolus competes hard for the same shallow root zone.
Plant Together
Carrots
Peas fix nitrogen in soil that carrots can utilize, while carrots don't compete for space
Radishes
Break up soil for pea roots and mature quickly before peas need full space
Lettuce
Benefits from nitrogen fixed by peas and provides living mulch to retain soil moisture
Spinach
Grows well in cool weather with peas and utilizes nitrogen they provide
Marigolds
Repel aphids and other pests that commonly attack pea plants
Chives
Deter aphids and other soft-bodied insects that damage pea pods
Mint
Repels ants and aphids, though should be contained to prevent spreading
Nasturtiums
Act as trap crop for aphids and cucumber beetles while attracting beneficial insects
Keep Apart
Onions
Can inhibit pea growth and nitrogen fixation through root compounds
Garlic
Allelopathic compounds can stunt pea growth and reduce pod production
Gladiolus
Competes heavily for nutrients and can harbor thrips that damage pea plants
Nutrition Facts
Per 100g serving. % Daily Value based on 2,000 calorie diet. Source: USDA FoodData Central (FDC #170419)
Pests & Disease Resistance
Resistance
Excellent resistance to powdery mildew and pea enation mosaic virus
Common Pests
Aphids, pea weevil, thrips
Diseases
Root rot in waterlogged conditions
Troubleshooting Snap Pea 'Cascadia'
What you'll see, why it happens, and what to do about it.
Leaf tips curling or puckering, with sticky residue on stems and foliage, usually noticed around week 3–4
Likely Causes
- Aphid infestation — NC State Extension notes aphids cause leaf curling and distortion, often confused with herbicide injury
- Thrips feeding on tender growing tips
What to Do
- 1.Knock aphids off with a firm stream of water from the hose; repeat every 2–3 days until the population drops
- 2.Spray insecticidal soap (2–3% solution) directly on colonies, making sure to hit the undersides of leaves
- 3.Check for ants farming the aphids — if you see ant trails up the stems, band the supports with sticky tape to cut off their access
Plants wilting and yellowing from the base up, with dark or water-soaked roots when you pull one up
Likely Causes
- Root rot from waterlogged soil — NC State Extension flags this as the primary disease concern for peas in poorly drained beds
- Heavy clay soil or a low spot in the bed that pools after rain
What to Do
- 1.Stop watering immediately and let the bed dry down; Cascadia wants about 1 inch per week, not more
- 2.If the bed drains poorly, raise it 6–8 inches with compost-amended soil before the next planting
- 3.Pull and trash affected plants — don't compost them — and avoid planting peas in that spot for at least one full season
Small, round holes bored into developing seeds inside the pod, or exit holes visible in dry seed saved from the plant
Likely Causes
- Pea weevil (Bruchus pisorum) — adults lay eggs on young pods, larvae bore directly into the seed
What to Do
- 1.Harvest pods promptly at 60–70 days before weevils complete their cycle; don't leave mature pods hanging on the vine
- 2.If saving seed, freeze it at 0°F for at least 4 days to kill any larvae before storing
- 3.Next season, use row cover from direct sow through flowering to block adult weevils during egg-laying
Frequently Asked Questions
How long does Cascadia snap pea take to grow?▼
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Cascadia vs Sugar Snap peas what's the difference?▼
Growing Guides from Wind River Greens
Where to Buy Seeds
Sources & References
External authority sources used in compiling this guide.
See the Methodology page for how this data is sourced, what's AI-assisted, and known limitations.