Catch Cropping Calendar

A catch crop uses a short gap in the bed, either before the main crop goes in or after it comes out. Done well, it adds a harvest without stealing from the main crop.

Key points

A catch crop fills a short gap before or after the main crop.
Count the gap in days, then pick a crop whose days to maturity fit.
Record catch crops by plant family so rotation stays intact.
Ask extension or NRCS about nutrient-catching cover crops for farm use.

What is a catch crop?

The term has two senses, and it helps to know both. In market gardening and home gardening, a catch crop is a fast crop grown in a gap between main crops. In soil management, a catch crop can also be a plant grown to take up leftover nutrients between cash crops and reduce loss. This article focuses on the first sense, with a nod to the second.

Either way, the key idea is that the crop fits into time that would otherwise be empty.

A quick crop in a short gap can be worth the effort when the gap is long enough, and it can suppress weeds that would otherwise move in.

Where do the gaps appear?

There are two common gaps. The first is early: a bed that will hold a warm-season crop sits empty while soil warms and frost danger passes. The second is late: after an early crop is harvested, there is time left before frost or before the next crop needs the bed.

Mark both gaps on your calendar using your frost dates, then count the days in each gap.

Soil moisture matters in short gaps. A quick crop sown into dry soil can stall, so water the seedbed before sowing and keep it moist until the seedlings are up. In hot weather, a layer of light mulch helps.

Early gap: between workable soil and the last spring frost or transplant date
Late gap: between early-crop harvest and fall frost
Edge gaps: new beds not yet in use
Space gaps: wide spacing between young transplants

Which crops make good catch crops?

Pick crops with a short time to harvest. Radish, leaf lettuce, spinach, arugula, baby greens, scallions and some quick turnips are common choices. Match the crop to the season: cool-season crops fill early and late gaps, and quick warm-season crops fill midsummer gaps if the season allows.

Check days to maturity on the packet, and treat the number as a minimum. Growth slows in cool, short days.

Record the days the gap actually lasted. Most gardeners guess a gap is longer than it is, and the record shows what is realistic for your own beds, so that next year you can choose catch crops that really fit.

How do you time a catch crop?

For an early gap, sow as soon as soil can be worked and the crop can handle the weather, and plan to harvest before the main crop needs the space. For example, if tomatoes will be transplanted after frost danger passes, a radish or lettuce crop sown earlier can be harvested before the tomato plants are large.

For a late gap, count backward from your first fall frost and compare with the crop's days to maturity. If the gap is shorter than the crop needs, choose something faster or skip it. Use your state extension planting guide for dates for your area.

Keep a short list of crops with the number of days each needs, so that when a gap appears you can match it quickly.

How do catch crops fit with rotation?

A catch crop counts as a planting in the bed. If you sow radish, a brassica, ahead of cabbage, you have two brassicas in the same bed in the same year. Record catch crops by family, and choose from a different family than the main crop when possible.

Rotation is easy to forget in a rush to fill gaps, so mark the grid whenever you add a catch crop.

What about the nutrient-catching sense of the word?

On farms, a catch crop or cover crop planted after harvest can take up nitrogen left in the soil and hold it in plant tissue, which may reduce loss through leaching. Whether it helps depends on crop, soil, weather and timing.

Your local extension office or NRCS office can describe options and any programs. Nutrient management rules and cost-share programs vary by state, so ask what applies to you.

What mistakes should you avoid?

Do not let the catch crop slow the main crop. Harvest on time, and pull leftovers before they shade or crowd. Do not skip fertility and water; quick crops still need moisture to grow fast.

Keep records of what worked, and drop crops that never succeed in your conditions.

Also remember that tidy harvest and cleanup save time, so avoid letting a catch crop go to seed in the bed where it can become a weed.

When to get local help: Your county extension agent or NRCS office can advise on catch crops and cover crops suited to your area.

Sources and further reading

Last reviewed: November 2026. Educational information, ranges only. Confirm timing with your county extension office.

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