When to Plant Turnip in Arizona (2026 Guide)

If you're considering growing turnips in Arizona, you're in for a treat. This underrated vegetable can thrive in various climates, especially in the warmer regions of the state. For many areas, like Apache Junction, the median last spring frost is as early as February 8, giving you an excellent window for planting.

Turnips are known for their cold-hardiness and ability to enhance their flavor post-frost, making the late fall harvest particularly rewarding. In cities like Bullhead City, the growing season is slightly shorter with a last spring frost on February 16, but you can still enjoy a productive turnip harvest.

No matter where you are in Arizona, understanding your local growing conditions is key. For instance, the median first fall frost in most regions occurs around December 5, offering plenty of time for a second planting if timed right. With this guide, you’ll learn when to plant and maximize your turnip harvest.

Planting Schedule by USDA Zone in Arizona

Zone	Indoor start	Transplant out	Direct sow	Harvest
Zone 8b–9a	Not recommended — direct sow only.	Not recommended — direct sow only.	Start February 9 – March 9, ~4–6 weeks before April 10.	Harvest August 30 – October 10, approximately 60 days after sowing.
Zone 7b–8a	Not recommended — direct sow only.	Not recommended — direct sow only.	Start February 17 – March 17, ~4–6 weeks before April 10.	Harvest September 1 – October 15, approximately 60 days after sowing.
Zone 5b	Not recommended — direct sow only.	Not recommended — direct sow only.	Start May 5 – June 5, ~4–6 weeks before July 10.	Harvest September 1 – October 10, approximately 60 days after sowing.

Turnip Planting Windows in Arizona

Indoor start: Indoor starting for turnips isn't recommended in Arizona due to their taproot nature.
Transplant outdoors: Turnips should also not be transplanted outdoors, as they are best sown directly in the soil.
Harvest: In Arizona, you can expect to harvest turnips from late August to mid-October, depending on your planting date.

Common Mistakes Growing Turnip in Arizona

One common mistake is not direct sowing turnips in Arizona. Many gardeners attempt to start them indoors, but they are taproot crops that don’t transplant well. Always sow them directly in your garden for the best results.
Many Arizona gardeners underestimate the power of a late frost. If you're in a higher elevation area like Prescott, ensure that your planting timeline accounts for unexpected cold snaps, as May 4 is the median last spring frost date there.
Overcrowding turnip seedlings is another frequent error. Arizona's heat may make it tempting to plant more closely, but this leads to small, misshapen roots. Remember to thin seedlings to 4–6 inches apart for optimal growth and development.
Ignoring harvest timing can diminish your turnip's flavor. Waiting too long may result in pithy roots, which many Arizona gardeners have experienced firsthand. Harvest when roots reach 2–3 inches in diameter for the best taste.
Lastly, failing to consider the soil conditions in Arizona can impact your turnip growth. Overly alkaline soils can hinder nutrient absorption, so incorporate organic matter to improve soil quality before planting.

Frequently Asked Questions

What if I'm in a cold pocket of Arizona?

If you live in a colder area, adjust your planting dates accordingly. Research local frost dates and consider using row covers to protect young plants from late frosts.

Can I still plant turnip in May?

May is typically too late for planting turnips in most of Arizona. If you’re in a cooler area, you might squeeze in a late planting, but aim for early spring for best results.

How long does it take for turnips to grow?

Turnips generally take about 30 to 60 days to mature, depending on the variety and growing conditions. Regularly monitor your plants for optimal harvest times.

What should I do if my turnips are small and elongated?

Small, elongated roots are often the result of overcrowding. Ensure you thin your seedlings to allow proper spacing for robust root development.

Can turnip greens be eaten?

Absolutely! Turnip greens are edible and quite nutritious. You can harvest the young leaves for salads or cook older leaves as you would with other greens.

Keep Learning

Typical fall sowing window for Turnip in Arizona: September 28 – October 19.