Direct sowing — planting seeds straight into the garden rather than starting them indoors — is one of the most efficient ways to practice succession planting. It eliminates the transplanting step, reduces the risk of root disturbance for crops that don't like being moved, and lets you get seeds in the ground at exactly the right moment for your specific conditions. This month-by-month guide covers what to direct sow for succession in zones 5 through 8, when to sow it, how to plan around days to maturity, and how to time replanting after harvest for a productive garden from early spring through first frost.
How to Use Days to Maturity for Succession Planning
The "days to maturity" figure on seed packets is your most important planning tool. It tells you approximately how many days from sowing (for direct-seeded crops) or transplanting (for transplant crops) until harvest. Combined with your first fall frost date, you can calculate the latest possible sowing date for each crop: subtract the days to maturity from your first frost date, then add a week or two buffer.
For example, in zone 6 with a first frost of October 15: a bean variety with 55 days to maturity has a last sow date of approximately August 12 (October 15 minus 55 days, minus a 7-day buffer). Knowing this lets you make confident late-season plantings without guessing whether they'll make it before frost.
Keep in mind that days to maturity is an estimate based on average conditions. In cool weather, crops mature more slowly; in heat, faster. Building in that extra week or two of buffer accounts for this variability.
Early Spring: March and April (Zones 5–8)
The direct sow season begins with cool-season crops that tolerate frost. In zones 7–8, this can start as early as late February; in zones 5–6, late March or early April once the soil is workable.
Radishes (25–30 days): The earliest crop you can direct sow. Start as soon as the soil can be worked. Sow a 4-foot row every 10–14 days through May, then resume in late August for fall radishes.
Spinach (40–50 days): Sow 4–6 weeks before last frost. Spinach germinates in cool soil (40–65°F) and actually prefers it. Make 2–3 weekly successions in early spring for an extended harvest before summer heat causes bolting.
Lettuce (45–60 days): Direct sow (or transplant) starting 4 weeks before last frost. Stagger sowings every 2–3 weeks. Choose heat-tolerant varieties like Jericho or Nevada for late-spring sowings that will mature in warmer weather.
Peas (60–70 days): Direct sow as early as 4–6 weeks before last frost — peas tolerate frost well and prefer cool conditions. Sow a second succession 2–3 weeks after the first for extended harvest before summer heat ends the season.
Carrots (70–80 days): Sow the first carrot succession in early spring as soon as soil temps reach 45°F. Carrots germinate slowly — 14–21 days — and need consistent moisture to sprout. Mark rows carefully so you don't weed them out before they emerge.
Late Spring: May (Zones 5–8)
After your last frost date, the direct sow possibilities expand to include frost-sensitive warm-season crops.
Beans, bush (50–65 days): Direct sow after last frost when soil temperatures reach 60°F. Beans don't transplant well — always direct sow. Make successions every 3 weeks through mid-July for harvests staggered into early fall. One of the most rewarding succession crops.
Cilantro (45–60 days to bolt): Direct sow in a cool spot — cilantro bolts quickly in heat. Make small sowings every 3 weeks starting at last frost, then take a summer break and resume in late August. Use the "days to bolt" rather than days to harvest as your planning figure for cilantro.
Dill (40–60 days): Direct sow after last frost. Like cilantro, dill develops a taproot early and doesn't transplant — always direct sow. Stagger every 3–4 weeks for continuous dill through the season.
Beets (55–70 days): Direct sow at last frost for first succession. Sow a second succession in late June or early July for a fall harvest — beets sweeten up in cool fall temperatures.
Summer: June and July (Zones 5–8)
June and July are the transition months: spring crops are finishing, warm-season crops are in full production, and the forward-thinking gardener is already planting for fall.
Beans (ongoing successions): Continue bean successions through mid-July. The last bean sowing that will mature before a zone 5–6 first frost (October 1–15) should go in no later than late July, depending on variety days to maturity.
Second carrot succession: Sow a second carrot succession in late June or early July. These carrots will be ready in September and October — prime fall eating. Fall-maturing carrots converted by cold temperatures develop higher sugar content than summer-grown carrots.
Fall brassicas (started from transplant or direct sow): Broccoli, kale, and Brussels sprouts for fall harvest are started in late June or early July in most zones — count backward from first frost by the crop's days to maturity plus a few weeks for establishment.
Late Summer: August (Zones 5–8)
August is a second spring for cool-season crops. Many gardeners miss this window entirely, but it's one of the most productive planting months of the year.
Lettuce and spinach: Resume direct sowings for fall harvest. In zone 5–6, sow lettuce through early September; in zone 7–8, through late September or into October. Fall-grown lettuce often has better flavor and texture than spring lettuce — cool nights slow growth and improve quality.
Radishes: Resume radish succession plantings every 10–14 days through September. Fall radishes are reliably excellent.
Arugula: Direct sow in early to mid August. Arugula germinates readily in warm soil and grows quickly — you'll have harvest-ready leaves in 30–40 days, well before frost.
Turnips and hakurei salad turnips: Direct sow in early August for a fall harvest. These fast-maturing root crops (45–60 days) are excellent fall succession candidates that most gardeners overlook.
Replanting After Harvest: Closing the Loop
The final piece of succession planning is using finished beds efficiently. When spring peas come out in June, that bed space becomes available for a bean succession or summer greens. When early carrots are harvested in July, fall brassicas or a second carrot succession goes in. When garlic comes out in July, fall crops fill that space immediately (see the succession planting guides for specific after-garlic options).
Keep a simple planting log: crop, sow date, harvest date, bed number. After one full season you'll have a detailed record that makes planning the following year straightforward — you'll know exactly which successions worked, which gaps to fill, and which beds are available when.
Frequently Asked Questions
- What's the difference between direct sowing and transplanting for succession planning?
- Direct sowing works best for crops that don't like root disturbance (carrots, beets, radishes, beans, dill, cilantro) and fast-maturing crops where the time savings from transplants isn't meaningful (radishes, spinach). Transplanting is better for slow-growing crops (tomatoes, peppers, broccoli) where starting indoors gains 6–8 weeks.
- How do I keep track of multiple succession plantings?
- A simple paper garden journal or spreadsheet with columns for crop, sow date, expected harvest date, and bed location is all you need. Some gardeners use colored stakes in the garden — one color per succession — which makes it easy to see at a glance which succession is which.
- Can I direct sow in late summer even if it's still hot?
- Yes — most cool-season crops will germinate in late summer heat and then grow more vigorously as temperatures cool through September and October. Pre-soak lettuce seeds for 30 minutes before sowing in late summer (above 75°F soil temperature can inhibit germination). Provide shade cloth over newly sown beds during heat waves.
- What zones does this schedule apply to?
- The schedule above is designed for zones 5–8. Zone 5 gardeners should stick to the earlier ends of sowing windows; zone 8 gardeners can push later into fall and start earlier in spring. In zones 9–10, the calendar essentially flips — cool-season crops grow in fall and winter rather than spring.