Succession planting — harvest every week from one bed

Succession planting — harvest every week from one bed

The classic beginner mistake is sowing a whole packet of lettuce on one April weekend, harvesting 30 heads in the same fortnight in June, and having nothing for the rest of the year. Succession planting fixes this. It is the single highest-leverage planning habit in vegetable gardening: same bed, same effort per sowing, but the harvest spreads across the whole season instead of collapsing into one unmanageable week.

Plan your succession calendar in Growli: Tell Growli which crops you want and your location, and the app builds a staggered sowing schedule around your frost dates, then reminds you when each new batch is due.

The principle — why staggering beats one big sowing

A crop sown on a single date matures on roughly a single date. Lettuce sown all at once is ready all at once, bolts a week or two later in warm weather, and is wasted. The yield curve is a tall narrow spike.

Succession planting flattens that spike into a plateau. By splitting one packet into five or six small sowings spaced two to three weeks apart, each sowing matures on a different date, and the harvest window stretches from a single week to two or three months. You eat what you grow instead of composting half of it.

There are three distinct forms of succession, and gardeners often conflate them:

1. Same-crop staggered sowing — the classic: a short row of lettuce every 14 days. This is the form this guide focuses on.
2. Relay / replacement succession — when one crop finishes, a different crop goes straight into the vacated space (spring peas pulled in July, replaced by fall brassicas). Covered in the fall vegetable garden guide.
3. Different-maturity varieties — sow early, mid, and late varieties of the same crop on one date so they mature in sequence. Useful for crops you only want to sow once (sweet corn, potatoes).

All three deliver continuous harvest. The staggered sowing form is the most flexible and the easiest to learn first.

Which crops to succession-plant — and which never to

The crops worth succession-sowing share three traits: fast to mature, short harvest window once mature, and they bolt or go woody if left in the ground. The crops to leave as a single planting either crop continuously on their own or take so long to mature that a second sowing never finishes.

Succession-plant these (fast, short window)

These intervals are consistent with the succession-interval guidance published by university Extension services and seed-house growing libraries (Johnny's Selected Seeds, UConn Home & Garden, West Virginia University Extension): roughly every 1 to 2 weeks for the fastest crops, every 2 to 4 weeks as days-to-maturity lengthens.

Never succession-plant these

• Indeterminate (vine) tomatoes — one planting produces from midsummer until frost. A second sowing never catches up before the season ends. Determinate (bush) tomatoes set one concentrated flush, so a second early sowing can help in long-season zones, but most home growers should treat tomatoes as a single planting.
• Winter squash and pumpkins — 90 to 120 days to maturity. There is no time for a second crop.
• Garlic — planted once in autumn, harvested the following summer. See when to plant garlic.
• Maincrop potatoes, Brussels sprouts, leeks, parsnips, sweet potatoes — long-season crops with a single harvest window.
• Perennials (asparagus, rhubarb, perennial herbs) — planted once, harvested for years.

For these, use variety succession instead: sow early, mid, and late varieties together (early + maincrop potatoes; early + late sweet corn) so a single planting date still spreads the harvest.

The step-by-step succession protocol

Step 1 — Find your sowing window

The window opens at your last spring frost and closes roughly 8 to 12 weeks before your first autumn frost (8 weeks for radish and fast leaves; 12 weeks for carrots and beets that need longer to size up). Use the frost date calculator to set both ends precisely for your location. Cool-season crops (lettuce, spinach, radish) also get a second window: pause through midsummer heat, then resume late summer for an autumn run.

Step 2 — Divide the packet

Decide how many sowings the season allows. A 5-month window at a 14-day interval = roughly 10 sowings. Split the seed packet accordingly — you do not need a full row each time. A 1 m / 3 ft mini-row of lettuce every fortnight feeds a household far better than a 3 m row once.

Step 3 — Sow on a fixed calendar day

Pick a recurring day (every other Saturday is the classic). Sow the next small batch whether or not the previous one looks ready — the calendar, not the bed's appearance, drives the schedule. This single habit is what separates a continuous harvest from a glut.

Step 4 — Sow the next batch when the last one germinates

A useful refinement to the fixed-calendar method: sow the next batch when the previous batch's seedlings emerge (true leaves visible). Germination speed already integrates soil temperature, so this self-corrects for cold spring soil and hot summer soil better than a rigid date.

Step 5 — Use the plant spacing calculator so mini-rows still yield

Small batches still need correct in-row spacing or they yield poorly. Thin radish to 2.5 cm / 1 in, leaf lettuce to 15 cm / 6 in, beets to 7.5 cm / 3 in. The plant spacing calculator sizes each mini-row to the bed.

Step 6 — Replace, do not leave gaps

When a batch finishes, clear it and sow the next succession crop into that space the same day. Bare soil is wasted bed-time and a weed nursery. This is where same-crop succession blends into relay succession.

A worked season calendar (temperate, last frost mid-April, first frost mid-October)

This is a model six-month plan for a single 1.2 × 2.4 m / 4 × 8 ft bed. Adjust the dates to your own frost window.

The pattern: something is always being sown, and something is always being harvested. Nothing is ever harvested all at once.

Crop-by-crop succession notes

Lettuce and salad leaves

The flagship succession crop. Sow leaf lettuce or mesclun every 14 days spring and autumn; head lettuce every 21 days. In midsummer most lettuce bolts (goes bitter and sends up a flower stalk) above roughly 24–27°C / 75–80°F soil — switch to bolt-resistant summer varieties or pause and resume in late summer. Cut-and-come-again harvesting (taking outer leaves, leaving the crown) effectively gives each sowing its own mini-succession.

Radish

The teaching crop because it is so fast (25–35 days) that the consequences of getting the interval right or wrong are visible within a month. Sow every 10–14 days. Radish left in the ground past maturity turns pithy and pungent within a week — this is exactly why the small-batch discipline matters.

Bush beans

Sow every 14–21 days from last frost until ~10 weeks before first frost. A bush-bean plant produces for 2–3 weeks then declines, so three or four staggered sowings carry beans from midsummer to frost. Pole beans, by contrast, crop continuously for two months from one sowing — do not succession-plant them.

Beets and carrots

Slower (50–80 days) so longer intervals — every 21–28 days. Both can be left in the ground after maturing far longer than radish or lettuce, so the penalty for an imperfect interval is small. Carrots in particular store well in situ under mulch into early winter in milder zones.

Scallions, peas, turnips, kohlrabi

Scallions are the most forgiving — they hold in the ground for weeks. Dwarf peas crop over ~2 weeks per sowing, so succession at 14–21 days; tall peas crop longer and need fewer sowings. Turnips are a fast brassica ideal for autumn succession. Kohlrabi goes woody if oversized, so keep batches small and harvest at tennis-ball size.

Common succession-planting mistakes

• Sowing the whole packet on day one. The original mistake this entire technique exists to prevent.
• Stopping too early in the season. Most gardeners stop succession-sowing by July. Cool-season crops have an entire second autumn window — see the fall vegetable garden guide.
• Letting the calendar slip. Skip two fortnights and a month-long harvest gap opens. The fixed-day habit is the whole game.
• Succession-planting the wrong crops. Staggering tomatoes or winter squash wastes seed and bed-time.
• Leaving cleared space bare. A finished batch is an immediate sowing opportunity, not a fallow gap.
• Same interval for all crops. Radish wants 10–14 days; carrots want 21–28. Match the interval to days-to-maturity.
• Ignoring soil temperature. A fixed-date sowing into cold April soil or baking July soil germinates erratically. The "sow when the last batch germinates" rule self-corrects this.
• No record of what was sown when. By August you cannot reconstruct the schedule from memory. Log every sowing (a notebook, a spreadsheet, or Growli).

UK + US notes

UK

• The damper, cooler UK summer is kinder to succession lettuce and spinach than most US summers — the midsummer bolting pause is shorter, and salad leaves can often run continuously June–September with bolt-resistant varieties.
• Sow under cloches or fleece for the earliest and latest successions to extend the window at both ends; pair with the winter vegetable garden techniques for an almost year-round salad supply.
• Slugs target young succession seedlings hardest. Each new mini-row is a fresh slug target — protect with grit, copper, or ferric phosphate pellets (metaldehyde was withdrawn in Great Britain in 2022).

US

• Hot-summer zones (7+) get the strongest midsummer bolting pause — most leafy successions stop late June and restart late August for a heavy autumn run. Use afternoon shade cloth to extend the spring window.
• Short-season northern zones (3–5) have a tighter window: shorten intervals slightly (10–14 days even for slower crops) and lean on fast varieties so every sowing finishes before first frost.
• Mild-winter zones (9–11) effectively succession-plant cool-season crops right through winter and pause in summer instead — the calendar inverts.

For the full bed plan that succession sits inside, see vegetable garden layout, and pair compatible crops using the companion planting guide. Many gardeners start their first successions indoors — see seed starting indoors.

Related

• How to start a vegetable garden — the 5-step beginner plan
• Vegetable garden layout — the bed plan succession sits inside
• Fall vegetable garden — the autumn succession window
• Seed starting indoors — getting early successions ahead of frost
• Companion planting guide — pairing succession crops
• Frost date calculator — set both ends of the sowing window
• Plant spacing calculator — size each mini-row correctly
• Companion planting hub — full pairwise compatibility matrix

Sources: Johnny's Selected Seeds succession-interval growing library; University of Connecticut Home & Garden Education; West Virginia University Extension; Maine Organic Farmers and Gardeners Association; Cedar Circle Farm Education Center succession-planting guidance.