When should I plant Curled Mallow in Zone 4a?

Direct sow Curled Mallow outdoors around May 5. Harvest around Jun 29.

What is the last frost date for Zone 4a?

The average last spring frost date for Zone 4a is May 5. The first fall frost averages Oct 1, giving a 149-day growing season.

Yes. Curled Mallow needs 55 days to harvest. Zone 4a has a 149-day growing season, which is sufficient. You can plant up to 4 successions.

Zone 4a has cold winters and a moderate growing season. Timing is key for Curled Mallow in this zone. Last frost: May 5. First frost: Oct 1.

Outdoor

Harvest

May 5Oct 1

Season: May 5 – Oct 1 (149 days) · Succession: plant every 3 weeks (up to 4x)

Zone4a

Last FrostMay 5

First FrostOct 1

Season Length149 days

Days to Harvest55

SunFull Sun

Frost ToleranceLight

Spacing4/sqft (6" apart)

Direct sow Curled Mallow seeds outdoors around May 5. Soil temperature should be at least 50°F. Space at 4/sqft (6" apart).

First harvest approximately Jun 29 (~55 days from planting). Continue harvesting until first frost (Oct 1).

1a 1b 2a 2b 3a 3b 4a 4b 5a 5b 6a 6b 7a 7b 8a 8b 9a 9b 10a 10b 11a 11b 12a 12b 13a 13b

Track Curled Mallow from seed to harvest with personalized frost dates, watering recommendations, and companion planting visualization.