Succession Planting

Plan succession sowings of lettuce, radishes, beans and more: how often to sow, the last date that still ripens before frost, and dates for each sowing.

Opening your garden…

Plan successions

  1. 01Plant a crop like lettuce over several squares.
  2. 02In its panel, choose the number of sowings (Pro): the squares are shared between them, each sown days apart.
  3. 03The calendar dates every sowing, and flags any that won't ripen before your first fall frost.

Why sow little and often

A whole bed of lettuce sown on one day is ready on one day, then bolts. Sowing a square or two every couple of weeks gives a steady harvest instead. Fast crops suit it best: lettuce and salad mix, radishes, spinach, bush beans, beets, carrots, cilantro and dill.

The last sowing has to ripen before the first fall frost. The planner works it out from each crop's days to harvest and how much frost it takes: hardy crops keep going for a while after the first frost, tender ones don't.

Days between sowings, from the crop library
CropSow again every
Arugula14 days
Beet21 days
Bush Bean14 days
Carrot21 days
Cilantro21 days
Cucumber21 days
Dill21 days
Green Onion21 days
Head Lettuce21 days
Leaf Lettuce14 days
Mustard Greens14 days
Radish10 days
Romaine Lettuce14 days
Salad Mix (baby greens)14 days
Spinach14 days
Summer Squash (zucchini/yellow)21 days
Sweet Corn14 days
Turnip21 days

Questions

How often should I succession plant lettuce?

About every two weeks through spring and again from late summer, skipping the hottest weeks when lettuce bolts quickly.

Can I succession plant in the same spot?

Yes: when one crop is harvested, sow or plant the next. An early crop of peas or radishes can be followed by beans, or by a fall crop of kale, in the same squares.

More garden planning

Sources

  1. Colorado State University Extension, Vegetable Planting Guide (CMG GardenNotes #720), with other US extension planting guides
  2. NOAA National Centers for Environmental Information, U.S. Climate Normals 1991–2020 (annual/seasonal, by station: freeze dates at 32 °F)