When to Plant Peas in Santa Rosa, CA
Published: April 24, 2026
Pea Planting Dates for Santa Rosa, CA
| Start seeds indoors | Year-round |
| Last frost (average) | March 22 |
| Direct sow outdoors | February 15–25 |
| Minimum soil temperature | 40°F |
| Expect first harvest | April 11 – April 26 |
| Fall crop planting | September 1–11 |
| Fall crop harvest | October 26 |
| First fall frost (average) | November 10 |
⚠Plant peas 4–6 weeks before last frost — one of the first vegetables of spring. Tolerate light frost. Also plant in late summer for a fall harvest.
Best Pea Varieties for Santa Rosa, CA
Consult a Santa Rosa-area nursery or your state extension office for pea varieties proven in Zone 6b.
Growing Peas in Santa Rosa
Santa Rosa sits in Zone 6b, with an average last frost of March 22 and first fall frost around November 10 — giving a 233-day frost-free growing season. Cool-season crops like pea benefit from Santa Rosa's cooler spring and fall windows, when temperatures stay in the 55–75°F sweet spot that produces the best flavor and least bolting.
Santa Rosa's moderate climate supports pea on the standard transplant calendar with minimal special accommodation. Succession planting — sowing fresh seeds or setting new transplants every 2–3 weeks through spring — stretches the harvest window and gives you a backup crop if pests hit the first planting.
Santa Rosa's mixed soil conditions vary block by block — get a soil test if you have not in three years. Generally, a base of quality compost (2 to 3 inches annually) and consistent watering at 1 inches per week serves pea well across most soil types found in Santa Rosa.
Pea Calendar for Santa Rosa
| Month | Task |
|---|---|
| Year | Start seeds indoors under grow lights |
| March | Last frost — soil warming, prepare bed |
| February | Direct sow seeds into warm soil |
| April | Expect first harvest window to open |
| September | Start fall crop — transplants or direct sow |
| November | First fall frost — harvest remaining, end of outdoor season |
Pea Tips for Santa Rosa Gardeners
- •Soak pea seeds overnight before planting to speed germination in cool soil.
- •Install a 4–6 foot trellis at planting time — peas climb from day one and produce more per square foot when supported.
- •Succession plant pea in Santa Rosa every 2–3 weeks through spring to extend the harvest window into summer.
Common Pea Pests in Santa Rosa
- •Pea Aphid — peaks July in Zone 6b (active May–September); monitor closely during peak season and treat early.
- •Powdery Mildew — peaks July in Zone 6b (active May–September); white powdery coating on leaves; improve airflow and apply milk spray (1:9 milk-to-water).
- •Root Rot — peaks July in Zone 6b (active May–September); monitor closely during peak season and treat early.
Check plants every 2–3 days during peak season — early intervention prevents most infestations from becoming serious.
What to Plant with Peas in Santa Rosa
In Santa Rosa's moderate climate, Carrot and Radish are the most beneficial plants to grow alongside pea. Carrot shares root-zone space without competing because carrot roots run deeper than most companions. Keep pea away from Onion — it inhibits bean and pea growth through sulfur-compound allelopathy.
Frequently Asked Questions
When should I plant pea in Santa Rosa, CA?
In Santa Rosa (Zone 6b), direct sow pea around February 15–25. Soil must be at 40°F or warmer at 2-inch depth before sowing — cold soil rots the seeds.
What zone is Santa Rosa, CA for pea growing?
Santa Rosa is USDA Zone 6b. For pea, this means a frost-free growing season of roughly 33 weeks running from March 22 to November 10. Cool-season crops like pea thrive in this zone with both spring and fall planting windows available.
When is pea harvest season in Santa Rosa?
Expect the first pea harvest in Santa Rosa around April 11, with harvest continuing through April 26. This is based on 55–70 days from transplant or direct sow. A fall crop planted September 1–11 adds a second harvest around October 26.
How long does it take to grow pea in Santa Rosa, CA?
From transplant or direct sow to first harvest, pea takes 55–70 days in Santa Rosa's climate. Based on a typical planting date of February 15–25, expect your first harvest around April 11. Santa Rosa's Zone 6b transition-zone climate produces maturity times right in the middle of the stated range.
What soil does pea need in Santa Rosa?
Santa Rosa's soil conditions vary block by block. Before planting pea, do a soil test (most state extension offices run them for $15–30). The test reveals pH, key nutrient levels, and organic matter content, so you can amend appropriately rather than guessing. Generally, 2–3 inches of compost annually improves most soils for vegetable production.