Growing Black-Eyed Susan in Zone 4b

Zone 4b has cold winters and a moderate growing season. Timing is key for Black-Eyed Susan in this zone. Last frost: May 1. First frost: Oct 5.

Planting Calendar

Indoor

Outdoor

Harvest

Mar 6Oct 5

Season: May 1 – Oct 5 (157 days)

Zone4b

Last FrostMay 1

First FrostOct 5

Season Length157 days

Days to Harvest75

SunFull Sun

Frost ToleranceModerate

Spacing12/sqft

When to Plant Black-Eyed Susan in Zone 4b

Start Seeds Indoors: Mar 6

Start Black-Eyed Susan seeds indoors around Mar 6 (8 weeks before last frost). Optimal germination temperature: 70°F. Germinates in 10–21 days.

Transplant Outdoors: May 1

Transplant Black-Eyed Susan seedlings outdoors after May 1. Wait until soil temperature reaches 55°F. Space plants at 12/sqft. Harden off plants for a week before moving outside.

Harvest: Jul 30

First harvest approximately Jul 30 (~90 days from transplant). Continue harvesting until first frost (Oct 5). Black-Eyed Susan can overwinter in mild climates for continued harvest.

Black-Eyed Susan in Other Zones

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

Frequently Asked Questions

When should I plant Black-Eyed Susan in Zone 4b?

Start Black-Eyed Susan seeds indoors around Mar 6. Transplant outdoors after May 1. Expect first harvest around Jul 30.

What is the last frost date for Zone 4b?

The average last spring frost date for Zone 4b is May 1. The first fall frost averages Oct 5, giving a 157-day growing season.

Can I grow Black-Eyed Susan in Zone 4b?

Yes. Black-Eyed Susan needs 75 days to harvest. Zone 4b has a 157-day growing season, which is sufficient.

What is the best month to plant Black-Eyed Susan in Zone 4b?

The best time to start Black-Eyed Susan in Zone 4b is Mar. Begin seeds indoors around Mar 6, then transplant outdoors after the last frost date of May 1.

How long does Black-Eyed Susan take to harvest?

Black-Eyed Susan takes approximately 75 days from planting to harvest. In Zone 4b, expect your first harvest around Jul 30.

Plan Your Black-Eyed Susan Garden

Track Black-Eyed Susan from seed to harvest with personalized frost dates, watering recommendations, and companion planting visualization.

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