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Potting

What To Plant In Late Summer
Succession planting keeps the harvest humming along

By: Gardener's Supply Co.

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A late summer sowing of mesclun mix.

Seeds germinate fast when the soil is already nice and toasty. For delicious, picture-perfect fall crops of spinach, lettuce, peas, and cilantro, now’s the time to plant.

Crops to Plant in Late Summer

Choose plants that either grow quickly or do not mind a touch of frost when they are close to maturity. Generally, a "light frost" indicates temps in the low 30's (degrees F), while a "hard frost" is below 32 degrees F.

Direct seed or, start indoors a few weeks earlier under grow lights. Wondering how long it takes for seeds to germinate indoors?

Plant

Days to Maturity

Cold Tolerance

Spinach

30-40 days

Tolerates light frost

Mustard greens

30-40 days

Tolerates light frost

Radish

30-50 days

Tolerates a hard frost

Arugula

40-50 days

Tolerates a hard frost

Leaf lettuce

40-60 days

Tolerates a light frost

Calendula

45-55 days

Tolerates a light frost

Beans

45-60 days

Will not survive a frost

Kale

45-60 days

Tolerates a hard frost

Swiss Chard

45-60 days

Tolerates a hard frost

Basil

45-60 days

Will not survive a frost

Sweet Pea

50-60 days

Tolerates a light frost

Cilantro

55-75 days

Tolerates a light frost

Peas

60-70 days

Tolerate a light frost

Cauliflower

60-80 days

Tolerates a light frost

Cabbage

60-90 days

Tolerates a hard frost

Sunflower

60-90 days

Tolerates a light frost

3 Tips for Late Summer Planting

  1. Pull, then plant

As soon as any early season plants have passed their prime, pull them out and replant. Cucumber fizzle out? Pop peas in their place. Put the old plants in your compost pile, then replenish the soil by forking in some compost and organic fertilizer. Rake the surface smooth and sow something new!

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Shade netting protects crops from summer sun and heat.

  1. Screen the sun (and then fortify against frost!)

For good late-summer germination, it's important to keep the soil surface from drying out and not let soil temperatures rise over 80 degrees F. Wire hoops and shade fabric are an easy solution, coupled with regular, consistent watering. Fall-planted seeds should be sown twice as deep as in the spring. Natural shade from a trellis or tall plant can also provide a good spot for seeding a second crop.

Unless the plant is frost hardy (see table above), extend the season with proper covers. When cold weather arrives, keep plants warm with a floating row cover.

  1. Don't delay

Summer-planted crops usually require an extra two weeks to mature — although soil is warm initially, days are shorter and air temperatures are often cooler by early fall. Using the days-to-maturity figure on the seed packet, count back from your fall frost date, then add a week or so for the "fall factor". This will give you your fall planting date.


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