Cabbage plants tolerate light frost, so setting them out two to three weeks before the last frost works well. Knowing exactly when to plant cabbage plants can mean the difference between a bumper harvest and a disappointing one. This guide covers everything you need to time your planting perfectly, whether you are starting from seed or buying transplants.
Let’s get straight into the details. You want firm, solid heads of cabbage, not loose leaves or bolted stems. The secret is all in the timing.
When To Plant Cabbage Plants
The short answer is: plant cabbage in early spring for a summer harvest, or in mid-to-late summer for a fall harvest. But the exact date depends on your local climate and the specific variety you choose.
For spring planting, aim to set out transplants 2 to 4 weeks before your last expected frost date. Cabbage thrives in cool weather. If you wait too long, the heat will cause the heads to split or bolt.
For fall planting, count backward from your first fall frost date. You want the cabbage to mature during cool autumn weather, not during the heat of late summer.
Understanding Your Frost Dates
Your first step is to find your local frost dates. Check online with your county extension office or a gardening app. Write down your last spring frost date and your first fall frost date.
- Spring planting: Transplants go out 2–4 weeks before last frost.
- Fall planting: Direct seed 10–12 weeks before first fall frost.
- Transplants for fall: Set out 6–8 weeks before first fall frost.
These windows give the cabbage time to grow in cool, moist conditions. Cabbage tastes sweeter after a light frost, so don’t rush to harvest.
Starting From Seed Indoors
If you grow from seed, start them indoors 4 to 6 weeks before your transplant date. Use a seed-starting mix and keep the soil moist but not soggy. Cabbage seeds germinate best at soil temperatures between 65°F and 75°F.
- Fill trays with seed-starting mix.
- Sow seeds ¼ inch deep.
- Cover lightly with soil or vermiculite.
- Water gently from below.
- Place under grow lights or in a sunny window.
- Harden off seedlings for 7–10 days before transplanting.
Hardening off is crucial. Gradually expose seedlings to outdoor conditions over a week. Start with a few hours of shade, then increase sun and wind exposure daily.
Direct Sowing Cabbage Seeds
You can also direct sow cabbage seeds into the garden. This works best for fall crops. Sow seeds ½ inch deep, 12–18 inches apart, in rows 24–36 inches apart. Thin seedlings to the strongest one per spot once they have two true leaves.
Direct sowing for spring is riskier because the soil may be too cold. Wait until soil temperature reaches at least 45°F. If a hard freeze is forecast, cover the seedlings with row cover or a cloche.
Regional Planting Guides
Your location changes the calendar. Here is a breakdown by region.
Northern Climates (Zones 3–5)
Spring comes late here. Plant transplants in late April to early May. For fall, direct seed in late June to early July. Use early-maturing varieties like ‘Early Jersey Wakefield’ or ‘Golden Acre’.
These short-season cabbages are ready in 60–70 days. They handle cold well but need protection from late frosts.
Moderate Climates (Zones 6–7)
Spring planting can start in March or early April. Fall planting is best from July to August. You have a longer growing season, so try mid-season varieties like ‘Red Acre’ or ‘Savoy King’.
Watch for heat waves in late spring. If temperatures spike above 80°F for several days, the cabbage may bolt. Use shade cloth if needed.
Southern Climates (Zones 8–10)
Spring is short and hot. Plant transplants in February or early March. For fall, wait until September or October. Cabbage grows best in the cooler months here.
Choose heat-tolerant varieties like ‘Blue Vantage’ or ‘Tropic Giant’. These resist bolting better in warm weather. You can also grow cabbage as a winter crop in zones 9–10.
Soil Preparation And Temperature
Cabbage loves rich, well-drained soil with a pH between 6.0 and 7.5. Prepare your bed a few weeks before planting. Mix in 2–4 inches of compost or well-rotted manure. Add a balanced fertilizer like 10-10-10 at the rate of 1 pound per 100 square feet.
Soil temperature matters. Cabbage seeds germinate poorly in cold, wet soil. For transplants, the soil should be at least 45°F at planting depth. Use a soil thermometer to check.
- Ideal soil temp for germination: 65–75°F
- Minimum soil temp for transplants: 45°F
- Optimal growing temp: 60–65°F
If your soil is too cold, warm it up with black plastic mulch for a week before planting. This also helps control weeds.
Spacing And Depth For Transplants
Set transplants 12–24 inches apart, depending on the variety. Small-headed cabbages can be closer, large ones need more room. Rows should be 24–36 inches apart.
Plant transplants at the same depth they were growing in the pot. Burying the stem too deep can cause rot. Water them in well after planting.
For fall crops, you can plant a little closer because the weather is cooler and the plants won’t get as large. Space them 12–18 inches apart for smaller heads.
Watering And Fertilizing Schedule
Cabbage needs consistent moisture. Water deeply once or twice a week, providing about 1–1.5 inches of water per week. Inconsistent watering causes heads to crack or split.
Use drip irrigation or soaker hoses to keep the leaves dry. Wet leaves invite disease like black rot or downy mildew.
Fertilize three weeks after transplanting with a side dressing of nitrogen-rich fertilizer. Use fish emulsion, blood meal, or a balanced granular fertilizer. Repeat every 3–4 weeks until the heads form.
- First feeding: 3 weeks after transplanting.
- Second feeding: when heads begin to form.
- Stop fertilizing once heads are firm.
Too much nitrogen late in the season can cause loose, split heads. Keep it balanced.
Common Timing Mistakes
Even experienced gardeners make errors. Here are the most common ones.
- Planting too early in spring: If the soil is too cold, transplants sit and rot. Wait until soil reaches 45°F.
- Planting too late in spring: Heat triggers bolting. Aim for a harvest before summer heat sets in.
- Planting fall cabbage too late: The heads need time to mature before hard freezes. Count backward from your first frost date.
- Ignoring variety maturity days: Some cabbages take 80 days, others 110 days. Check the seed packet.
Keep a garden journal. Note your planting dates, weather, and harvest results. This helps you adjust next year.
Succession Planting For Continuous Harvest
You can stretch your cabbage season by succession planting. Plant a few transplants every 2–3 weeks. This works best in spring and fall.
For spring, start with early varieties in March, then plant mid-season ones in April. For fall, plant early varieties in July and later ones in August. This gives you fresh cabbage for weeks.
Succession planting also reduces the risk of losing your whole crop to a single pest or weather event. It is a smart strategy for any vegetable garden.
Pest And Disease Timing
Pests like cabbage worms, aphids, and flea beetles are active at specific times. Plant early to avoid peak pest populations. For spring, planting before the soil warms up too much reduces flea beetle damage.
Use row covers immediately after transplanting. This blocks insects while letting in light and air. Remove covers when plants start to flower or when temperatures exceed 85°F.
Rotate your cabbage family crops (broccoli, kale, cauliflower) to a different bed each year. This prevents soil-borne diseases like clubroot. Wait at least 3 years before planting brassicas in the same spot.
Harvesting At The Right Time
Harvest cabbage when the heads are firm and solid. Squeeze the head gently. If it feels loose, wait a few more days. A mature head will feel dense and heavy for its size.
Cut the head at the base with a sharp knife. Leave the outer leaves and stem in the ground. Some varieties will produce smaller secondary heads from the stump.
For fall cabbage, a light frost improves sweetness. But harvest before a hard freeze (below 28°F) damages the heads. Store harvested cabbage in a cool, humid place like a root cellar or refrigerator.
Storing Cabbage For Winter Use
If you plant a fall crop, you can store cabbage for months. Choose storage varieties like ‘Danish Ballhead’ or ‘Late Flat Dutch’. Harvest just before a hard freeze.
Remove loose outer leaves and trim the stem to 1 inch. Store heads in a cold, moist place (32–40°F, 95% humidity). A root cellar or a cold basement works well.
Wrap each head in newspaper or place in perforated plastic bags. Check regularly for rot. Properly stored cabbage keeps for 3–6 months.
Frequently Asked Questions
What is the best month to plant cabbage?
It depends on your climate. For spring, March to April is common in moderate zones. For fall, July to August works. Always check your local frost dates.
Can I plant cabbage in the summer?
Summer heat stresses cabbage. Only plant for a fall harvest, starting seeds in mid-summer. Use heat-tolerant varieties and provide shade if needed.
How late can I plant cabbage in the fall?
Count backward from your first fall frost date. You need enough days for the variety to mature. For a 70-day cabbage, plant at least 10 weeks before frost.
Do cabbage plants need full sun?
Yes, cabbage needs at least 6 hours of direct sun daily. Partial shade is okay in hot climates, but full sun produces firmer heads.
Can I grow cabbage in containers?
Yes, choose a container at least 12 inches deep and wide. Use a dwarf variety like ‘Minicole’. Keep the soil consistently moist and fertilize regularly.
Timing is everything with cabbage. Follow these guidelines, adjust for your local conditions, and you will enjoy crisp, sweet heads all season long. Start planning your planting dates today, and your garden will thank you.