What should I plant in August in Denver, CO?

In August in Denver, CO (zone 5b), you can plant Beet, Kale, Swiss Chard, Turnip, and more. These dates are based on local climate data for your area.

When do I plant Beet in Denver, CO?

In Denver, CO (zone 5b), Beet: direct sow Mar 24 – Sep 8.

When do I plant Kale in Denver, CO?

In Denver, CO (zone 5b), Kale: start seeds indoors Mar 9 – Jun 23, transplant outdoors Apr 24 – Aug 8.

When do I plant Swiss Chard in Denver, CO?

In Denver, CO (zone 5b), Swiss Chard: start seeds indoors Mar 24 – Jul 16, transplant outdoors Apr 24 – Aug 16.

What to Plant in August

Denver, CO · Zone 5b

Last frost: May 5 Frost-free days: 154

Full year calendar for Denver

Fall planting season is starting. Direct sow radishes, lettuce, spinach, and other fast cool-season crops for autumn harvest. Start brassica transplants indoors.

August at a Glance

Indoor Transplant Direct Sow

1 5 10 15 20 25

Beet

Kale

Swiss Chard

Turnip

Transplant 2

Move these seedlings from indoors to your garden beds.

Kale

Apr 24 – Aug 8

1 per sq ft 50–65 days

Swiss Chard

Apr 24 – Aug 16

4 per sq ft 50–60 days

Direct Sow 2

Plant these seeds directly into the soil outdoors.

Turnip

Mar 17 – Sep 23

9 per sq ft 30–60 days

Beet

Mar 24 – Sep 8

9 per sq ft 50–70 days

August Gardening Tips

Kale, Swiss Chard can be transplanted outside this month. Harden off seedlings over 5–7 days before planting out.
Direct sow Beet, Turnip straight into the garden — no transplanting needed.
Count backwards from your first frost date to determine the last safe date for starting fall crops.