Beets are a two-for-one crop in Zone 10: sweet roots in winter and edible greens all season. They are easy to grow, store well, and thrive in the cool months when the garden has space to spare. Sow them in autumn and pull roots from late winter into spring.
Zone 10 at a glance
USDA Zone 10 covers the warmest parts of the United States, including southern Florida, the southern tip of Texas, coastal southern California and Hawaii. Winters are mild, with average winter lows of 30 to 40°F, and the growing season runs nearly all year — frost is rare rather than a regular event.
The average last spring frost in Zone 10 is Jan 15–30 (frost rare), and the average first autumn frost is Dec 15–31 (frost rare). These are zone averages drawn from NOAA frost records, not exact dates for any one garden — always check your local extension service and the forecast before planting tender crops outside. Frost dates vary by microclimate, elevation and year, so treat them as a guide, not a promise. Use our frost date calculator for your zone's averages.
When to plant beets in Zone 10
Plant beets from October to March in Zone 10, sowing seed directly where it is to grow. Beets are hardy and grow best in cool weather; roots sweeten in the mild winter and turn woody in summer heat, so autumn and winter sowings give the best flavour. Roots mature 50–70 days after sowing. Because Zone 10 has a long, nearly year-round growing season, the question is rarely whether beets will grow, but whether you plant it in the right season — heat lovers go in after the last frost, cool-season crops go in for autumn and winter.
Beets planting at a glance
| Detail | Zone 10 guidance |
|---|---|
| Best planting window | October to March |
| Start indoors | Not needed — direct sow |
| Days to germination | 7–14 |
| Days to maturity | 50–70 |
| Spacing | 3–4 in |
| Soil pH | 6.0–7.0 |
| Sun | full sun |
| Water needs | moderate |
| Cold tolerance | hardy |
All figures are broad published ranges from standard horticultural references, and they vary by variety, soil and weather. Check your local extension service for advice on your own garden.
Starting beets
Sow beets directly — they dislike transplanting because any damage to the young taproot causes forked or misshapen roots. Sow seed about half an inch deep in rows; like chard, each beet seed is a cluster that produces several seedlings, so thin to one plant every few inches once seedlings have true leaves, and eat the thinnings as baby greens. Seed germinates in 7–14 days. Sow small batches every few weeks for a steady supply rather than one big sowing that all matures at once.
Soil, spacing and sun
Beets need full sun and loose, fertile, well-drained soil with a pH of 6.0–7.0. Stones and heavy clods cause forked roots, so work the bed deeply and remove debris before sowing. Space plants 3–4 inches apart in rows — tight spacing suits baby beets, while full-sized roots need the wider end of the range. In Zone 10's sandy soils, compost improves both moisture holding and root shape. A shortage of boron can cause black hearts, so compost-rich soil helps here too.
Watering and feeding
Beets have moderate water needs, and even moisture is what makes sweet, tender roots: dry soil gives woody, tough beets, and a dry spell followed by heavy watering can crack roots. Water deeply and regularly, and mulch to keep the soil evenly damp. In Zone 10's dry winter spells, check the soil weekly rather than assuming rain has done the job. Water at the base to keep leaves dry and reduce leaf spot.
Companion planting
Good companions for beets are marigolds, basil, onions and lettuce. Onions are a classic beet companion, said to improve growth, and lettuce fits between rows and is harvested before the beets need the space. Avoid planting beets next to pole beans, which are poor neighbours, and keep them away from other root crops competing for the same ground. Rotate root crops to a fresh bed each year.
Pests and problems
The pests to watch for are aphids, slugs and cutworms. Aphids cluster on young leaves and can be washed off with water. Slugs chew holes in leaves on damp nights. Cutworms can sever seedlings at soil level; collars help. Leaf miners can tunnel pale trails through beet leaves — pick affected leaves off and destroy them. The roots themselves are rarely troubled in Zone 10, but wireworms in newly turned grassland can bore into them, so avoid planting beets where lawn was recently dug up.
Harvesting and storing beets
Harvest beets when roots are the size of a golf ball to a tennis ball, 50–70 days after sowing — smaller roots are sweeter and more tender, and oversized roots turn woody. Loosen the soil with a fork and pull gently, twisting off the tops rather than cutting them, which stops the roots bleeding colour. The greens are edible too: pick young leaves for salads or cook mature ones like chard. Store roots in a cool, dark place or in the fridge, where they keep for weeks.
Frequently asked questions
When do I plant beets in Zone 10?
From October to March, sown directly. They are a cool-season crop — check your local extension service for the best dates in your area.
Why are my beets all tops and no roots?
Usually overcrowding or excess nitrogen. Thin seedlings to 3–4 inches apart and avoid heavy nitrogen feeding once roots start to swell.
Can I eat beet greens?
Yes. Young leaves are good raw in salads and mature leaves cook like chard. Pick a few outer leaves per plant so the root keeps growing.
How long do beets take to grow in Zone 10?
Seed germinates in 7–14 days and roots mature in 50–70 days.
For the full year, browse the planting calendar hub. Nearby: november in Zone 10, Beets in Zone 9 and Turnips in Zone 10. Use the seed spacing calculator and the harvest date calculator to plan your own dates.