🫜 Can I Plant Turnip in Boise, ID?

2026 planting guide for Zone 7a · Last frost ~April 14 · Growing season ~182 days

✅ YES — Good time to plant for a fall harvest

Turnip thrives in cool weather and can be planted now for a fall harvest. Sow seeds soon — they'll be ready around Sep 3–Sep 28, well before the average first frost around Nov 20.

Planting window: Jul 30 – Aug 13
Sow turnip seeds directly now for a fall harvest. Expect to harvest around Sep 3.
Live result based on current forecast for Boise, ID · Updates every 6 hours
USDA Zone
7a
Last Spring Frost
~April 14
First Fall Frost
October 13
Growing Season
~182 days
Ideal Temp for Turnip
40–65°F
Frost Risk
✅ Tolerant

Growing Turnip in Boise

Boise's Zone 7a high desert location at 2,700 feet in the Treasure Valley provides about 182 frost-free days. The semi-arid climate means low humidity, intense sun, and low rainfall — irrigation is essential for any garden. The Snake River valley microclimate is warmer than surrounding high desert, supporting a productive summer season for tomatoes, peppers, corn, and beans. The dry air keeps fungal diseases minimal.

In Boise (last frost around April 14), turnip can go out around March — approximately 6 weeks before the last expected frost, making it an early-season opportunity.

Turnip thrives between 40°F and 65°F. It tolerates temperatures as low as 28°F, making it a candidate for early spring planting before the last frost date. Expect 35–60 days from transplant to first harvest. Fast cool-season root. Both roots and greens are edible.

Frequently Asked Questions

When can I plant turnip in Boise, ID?

In Boise (last frost around April 14), turnip can go out around March — approximately 6 weeks before the last expected frost, making it an early-season opportunity.

What is the USDA hardiness zone for Boise?

Boise, ID is in USDA Plant Hardiness Zone 7a. The last expected spring frost is around April 14, and the first fall frost arrives around October 13. This zone classification helps you understand which perennials survive winter and when annual vegetables can safely go outdoors.

Is it safe to plant turnip outside in Boise right now?

That depends on the current weather forecast. Turnip needs temperatures above 28°F (ideally 40–65°F) to thrive. CanIPlant checks your real 7-day forecast and any active frost alerts to give you a live YES, NO, or WAIT answer — just enter your ZIP code.

Can I grow turnip in Boise 2026?

Yes — Turnip grows well in Boise, ID. With a Zone 7a climate and a growing season of ~182 days, Boise is well-suited for cool-season crops like turnip. As a frost-tolerant crop, turnip can even go out a few weeks before the last frost date.

Grow Turnip in Other Cities

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