Some crops exist at the opposite end of the harvest-window spectrum from squash and tomatoes. Radishes are ready in 22 days and turn pithy within a week of peak size. Bush beans flood the kitchen over a three-week window and then decline. Arugula bolts in a warm week. These crops are not difficult to grow — they are simply optimized for speed, which means they need to be managed differently from slow, long-season vegetables.
Succession sowing is the answer. By splitting a planting into smaller portions sown at regular intervals, gardeners convert a single crop surge into a continuous, manageable supply. The technique is the same for all fast crops, with minor adjustments for each crop's specific maturity time and harvest window.
Bush Beans: The Classic Succession Crop
Bush beans go from sowing to first harvest in 50 to 60 days. Each planting produces heavily for two to four weeks before declining. A single packet of bush bean seeds, sown all at once, creates more beans than most households can eat fresh during its narrow harvest window — and then nothing.
Building a Bean Succession
Bean seeds cannot be started indoors — they are direct-sown after the last frost date when soil temperatures reach at least 60°F. The succession window for beans runs from after last frost through approximately 60 days before first expected fall frost (to allow the final sowing to mature).
In zone 6 with a last frost around May 1 and first fall frost around October 10:
- First sowing: May 5 — harvest late June to mid-July
- Second sowing: May 20 — harvest mid-July to early August
- Third sowing: June 5 — harvest early to late August
- Fourth sowing: June 20 — harvest late August to mid-September
- Final sowing: July 5 — harvest mid to late September (last viable sowing)
Five small sowings — each covering a 4-foot double row — provide continuous beans from late June through late September. Beans are a nitrogen-fixing legume, which means each sowing also improves the soil for subsequent crops. For companion planting strategies that pair beans effectively with other succession crops, the companion planting guide covers combinations that make the most of bed space.
Variety Choice for Bean Successions
For succession planting, bush bean variety matters less than for single plantings. Almost any reliable bush bean — Provider, Contender, Jade, Blue Lake 274 — will work. Provider is a common choice for early sowings because of its cold-soil tolerance. For late-season sowings, Contender's heat tolerance makes it a dependable finisher. Avoid pole beans for succession sowing — their long season and continuous production make them less suited to the method, though they can be interplanted with bush bean successions to fill gaps.
Radishes: Weekly Sowings for Continuous Supply
Radishes are arguably the easiest succession crop to manage. They mature in 22 to 30 days, occupy minimal space, and can be sown as a fill crop between slower-maturing plants. The challenge is their extremely short harvest window — three to five days at peak quality before they become hollow and hot.
The Weekly Radish Method
Sow a single short row — 12 to 18 inches — of radish seed every seven days from early spring through mid-May, pause through summer, then resume in August for fall harvests. Each sowing represents only 8 to 12 radishes, a reasonable quantity to consume in a week. The next sowing is ready precisely as the current one passes peak.
Radishes also serve as a row marker for slower-germinating crops. When sowing parsnips, carrots, or parsley — all of which can take 14 to 21 days to germinate — mix a few radish seeds into the furrow. The radishes sprout first, marking the row and loosening soil. By the time the main crop needs the space, the radishes have been harvested.
Avoiding the Radish Gap
Summer radishes (daikon types, watermelon radish, and others) tolerate heat better than spring radishes. Bridging the summer gap with a single sowing of a heat-tolerant variety — or switching to turnips during summer — prevents a complete interruption of the succession. Resume spring radish varieties in late August as temperatures moderate.
Arugula: Fast, Peppery, and Bolt-Prone
Arugula germinates in 5 to 7 days and is ready to harvest in 30 to 40 days. It is even more bolt-prone than lettuce in heat, making it a prime candidate for tight succession intervals — every 10 days in spring, slowing to every 14 days in cooler fall conditions.
Wild arugula (Diplotaxis tenuifolia) is slower to bolt than standard arugula (Eruca sativa) and worth growing for summer bridging. Standard arugula is more tender and milder when young; wild arugula has a sharper, more persistent flavor. Growing both simultaneously extends the usable harvest window from a single sow date.
Cilantro: The Most Bolt-Prone Herb
Cilantro bolts faster than almost any culinary herb. In warm weather, plants can go from seedling to flower in three weeks. Succession sowing every 10 to 14 days from early spring through late May, then again from late August through October, is the only reliable way to maintain a continuous supply of fresh foliage. Once a plant bolts, let it go to seed — coriander is a useful spice — and pull the plant to make room for the next sowing. The herb garden guide covers indoor succession methods for cilantro that extend the season past outdoor limits.
Spinach: Two Successions Per Year
Spinach is the most cold-tolerant of the standard salad greens, germinating in soil as cold as 35°F. It bolts in heat even faster than lettuce, which limits its productive window to spring and fall. A spring succession of three or four sowings beginning 8 weeks before last frost, and a fall succession of two or three sowings beginning 8 weeks before first hard frost, provides spinach through most of the season except summer.
Fall spinach can often be overwintered under row cover in zone 5 and warmer. Plants go dormant when temperatures drop below freezing but resume growth in early spring, providing the earliest possible greens before the first spring sowing is ready.
Timing Fast Crops Around Longer-Season Plantings
One of the most practical uses of fast-maturing succession crops is filling the gaps between longer-season plantings. A raised bed planted with tomatoes in late May has bare space between transplants for the first four to six weeks — enough time for two complete successions of radishes or one of lettuce. As tomatoes spread and begin shading the bed in July, the succession crops have already finished. This intercropping approach maximizes the productivity of every square foot without requiring additional beds. A beginner vegetable garden can produce significantly more using this combined succession and intercropping strategy than through traditional single-crop bed management.
Record-Keeping for Fast-Crop Successions
Fast crops cycle through multiple generations per season, which makes tracking sow dates especially important. A simple log — crop name, sow date, expected harvest date, and notes on germination or pest pressure — takes two minutes to update per sowing and prevents the confusion of not knowing which row was sown when. After one season, this record becomes a calibrated planting calendar that accounts for the specific conditions of a particular garden.
Frequently Asked Questions
How small should each succession sowing be?
For a household of two, a 12-inch row of radishes, a 2-foot row of arugula, or 6 to 8 bean plants per succession is usually sufficient. The goal is to finish each batch just as the next reaches peak. Start small — it is easy to increase subsequent sowings if the first is not enough.
Can beans and radishes be succession-sown in the same bed?
Yes, though they require different management. Radishes are ready in under 30 days; beans take 55 to 60. Interplanting a radish row between bean rows uses space that would otherwise be empty while beans establish. The radishes are harvested before beans need the space to spread.
Why do my radishes keep going to seed without forming roots?
Radishes bolt — forming seed stalks rather than swollen roots — when days are too long or temperatures too warm. For spring crops, this most often happens with late sowings in May and June. Switch to heat-tolerant daikon or watermelon radish types in summer, and resume spring radishes in late August when day length shortens.
How many succession sowings of beans can I fit in a season?
In most temperate zones, four to five succession sowings of bush beans are realistic between last spring frost and the date 60 days before first fall frost. In longer-season areas (zones 8–10), six or more sowings are possible. Each sowing covers roughly three weeks of production.
What do I do with the bed after each fast-crop succession is finished?
Clear the residue, add a thin layer of compost, and re-sow or transplant immediately. In most soil types, no additional preparation is needed between fast-crop successions. For beds with heavy pest pressure, a brief fallow period of one to two weeks with the soil uncovered allows beneficial predatory insects to work before re-planting.