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🥗 Growing Arugula in Zone 5a

Zone 5a has cold winters and a moderate growing season. Timing is key for Arugula in this zone. Last frost: Apr 28. First frost: Oct 8.

Planting Calendar

Indoor

Outdoor

Harvest

Mar 31Oct 8

Season: Apr 28 – Oct 8 (163 days) · Succession: plant every 2 weeks (up to 9x)

Zone5a

Last FrostApr 28

First FrostOct 8

Season Length163 days

Days to Harvest35

SunPart Sun / Part Shade

Frost ToleranceModerate

Spacing4/sqft (6" apart)

When to Plant Arugula in Zone 5a

Start Seeds Indoors: Mar 31

Start Arugula seeds indoors around Mar 31 (4 weeks before last frost). Optimal germination temperature: 65°F. Germinates in 3–7 days.

Transplant Outdoors: Apr 14

Transplant Arugula seedlings outdoors after Apr 14. Wait until soil temperature reaches 40°F. Space plants at 4/sqft (6" apart). Harden off plants for a week before moving outside.

Harvest: May 19

First harvest approximately May 19 (~35 days from planting). Continue harvesting until first frost (Oct 8).

Fall Planting: Sep 3

For a fall harvest, plant Arugula around Sep 3 (5 weeks before first frost).

Companion Planting

✅ Beans✅ Onions✅ Potatoes✅ Lettuce ✅ Dill✅ Beets✅ Carrots

❌ Strawberries

Arugula 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 Arugula in Zone 5a?

Start Arugula seeds indoors around Mar 31. Transplant outdoors after Apr 14. Expect first harvest around May 19.

What is the last frost date for Zone 5a?

The average last spring frost date for Zone 5a is Apr 28. The first fall frost averages Oct 8, giving a 163-day growing season.

Can I grow Arugula in Zone 5a?

Yes. Arugula needs 35 days to harvest. Zone 5a has a 163-day growing season, which is sufficient. You can plant up to 9 successions.

What is the best month to plant Arugula in Zone 5a?

The best time to start Arugula in Zone 5a is Mar. Begin seeds indoors around Mar 31, then transplant outdoors after the last frost date of Apr 28.

What companion plants grow well with Arugula?

Good companion plants for Arugula include Beans, Onions, Potatoes, Lettuce, Dill, Beets. Avoid planting Arugula near Strawberries.

How long does Arugula take to harvest?

Arugula takes approximately 35 days from planting to harvest. In Zone 5a, expect your first harvest around May 19.

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