What is succession planting?
Succession planting is the practice of sowing small batches of the same crop at regular intervals instead of putting every seed in the ground at once. Sow a whole packet of lettuce on a single April weekend and it all matures in the same ten days — a glut you can't eat, followed by months of nothing. Sow a short row every two weeks and you harvest a steady supply from spring well into summer.
The method works best for fast, re-sowable crops where freshness matters and storage doesn't: salad greens, roots, and tender herbs. Radishes are ready in three to four weeks, so a fortnightly sowing keeps crisp roots coming without a single bolting bed. Spinach, arugula, and cilantro reward the same discipline. The goal is a continuous, manageable harvest — not one overwhelming peak.
Done well, succession planting also makes better use of space and reduces waste. A bed that would otherwise sit empty after one cutting stays productive, and you sow only what you can use before the next batch is ready.
How the scheduler works
You enter a ZIP code and a crop. Gardenable looks up your location's frost dates from the NOAA 1991–2020 Climate Normals — the median last spring frost and first fall frost for the weather station nearest you — and pairs them with your USDA 2023 hardiness zone. From your first sensible sow date, it steps forward by the crop's succession interval, projecting a first-harvest date for each planting using the crop's days to maturity.
It also computes a last viable sow date: the latest day you can still sow and expect the crop to finish before your first fall frost, after subtracting days to maturity and a short safety buffer. Every date is grounded in verified extension data and your own local climate record — not a generic national average — which is what separates a plan you can act on from a rough rule of thumb.
Best crops for succession planting
The crops that succession best are the quick, cut-and-come-again ones. Start with lettuce and radish — both fast and forgiving — then add spinach and arugula for cool-season greens. Tender herbs like cilantro, basil, and dill bolt quickly, so re-sowing every couple of weeks is the only way to keep a fresh supply. Among warm-season crops, green beans respond well to two or three staggered sowings across early summer. Each of these has its own ideal interval, which the scheduler applies for you.
Frequently asked questions
How far apart should I stagger succession plantings?
It depends on the crop. Fast salad crops like lettuce, arugula, and radish do well at 10–14 day intervals; slower crops like kale, beets, and carrots are better staggered every 21–28 days. The scheduler reads each crop's interval from the crop database and spaces your sowings automatically.
Can I succession plant tomatoes?
No. Tomatoes are a single-season fruiting crop — you transplant once and harvest from the same plants for months, so there is nothing to stagger. Succession planting is for crops you re-sow in small batches. See the tomato growing guide for its single planting window.
What does 'last viable sow date' mean?
It is the latest day you can sow and still expect the crop to mature before your first fall frost. The scheduler calculates it from your station's first-fall-frost normal, minus the crop's days to maturity, minus a short safety buffer. Sow after that date and the crop likely won't finish.
Does this work for fall gardening?
Yes. The schedule runs through the whole growing season, and the last-viable-sow cutoff is anchored to your first fall frost — so it accounts for late-summer and fall sowings, not just spring. Each crop's fall planting window is part of the underlying data.