Vegetable · Greens

Astro Arugula

Brassicaceae

Astro is the most widely grown garden arugula variety — a slow-bolt cultivar selected for milder, less-bitter flavor compared to wild types (Sylvetta/Roquette). Baby leaf in 21 days, full harvest at 38-40 days. Peppery flavor intensifies with maturity and heat. Bolts quickly once temperatures exceed 75°F but excellent for succession planting. Germinates well in cold soil (40°F+), making it one of the earliest crops you can sow. Widely referenced in OSU, Cornell, and Territorial Seed extension recommendations for home gardens in zones 5-9.

At a Glance

Days to Maturity

21–40 days

Sun

4+ hours

Spacing

4–6 "

Container

Yes

1+ gallon pot

Zone Planting Guide

Your USDA Zone:

Growing Guide

Germination

Germination Time 3–7 days

Optimal Temp 53°F

Seed Depth 0.25"

Watering

Weekly Water 1–1.5 "

Needs Moderate-consistent

Soil

pH Range 6–7

Resilience

Heat: Low Cold: Medium Drought: Low

Harvest

Storage 4 days

Sources

university UBC Botanical Garden seed-catalog Baker Creek extension Arugula – Grow Your Own (University of Delaware Cooperative Extension, PDF) extension Arugula growing guide (Cornell Garden-Based Learning)

More Vegetables

Astro Arugula Planting Dates by Zone

Planting dates for Astro Arugula vary by USDA hardiness zone. Select your zone below for frost dates, start-indoors timing, and a full monthly planting calendar.

Zone 5A Zone 5B Zone 6A Zone 6B Zone 7A Zone 7B Zone 8A Zone 8B Zone 9A Zone 9B

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