Planting Timeline
Showing dates for Arugula in USDA Zone 7
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Arugula · Zones 2–11
Growing Details
Zone-by-Zone Planting Calendar
| Zone | Indoor Start | Transplant | Direct Sow | Harvest |
|---|---|---|---|---|
| Zone 3 | — | — | April – August | May – October |
| Zone 4 | — | — | April – August | May – October |
| Zone 5 | — | — | March – September | April – November |
| Zone 6 | — | — | March – September | April – November |
| Zone 7 | — | — | February – October | March – December |
| Zone 8 | — | — | February – November | March – December |
| Zone 9 | — | — | October – March | November – May |
| Zone 10 | — | — | October – March | November – May |
Complete Growing Guide
Start by preparing your soil with a pH between 6.0-7.0, working in 2-3 inches of compost to improve drainage while maintaining fertility. Arugula despises waterlogged conditions but needs consistent moisture, so test your soil's drainage by digging a hole and filling it with water—it should drain within 6-8 hours.
Skip starting seeds indoors unless you're in zones 9-10 where direct sowing timing is tricky. Arugula transplants poorly due to its taproot, and direct sowing gives you stronger, more productive plants. In zones 3-8, direct sow seeds ¼ inch deep as soon as soil can be worked in spring, typically 2-4 weeks before your last frost. For fall crops, plant 8-10 weeks before your first hard freeze.
Space seeds ½ inch apart in rows 6 inches apart—closer spacing actually improves flavor by encouraging competition. Thin to 2-3 inches apart once seedlings reach 1 inch tall, but eat those thinnings rather than composting them. Water immediately after sowing with a fine spray to prevent seed displacement.
Fertilize lightly with a balanced organic fertilizer at planting, then side-dress with compost tea every 2 weeks. Over-fertilizing, especially with nitrogen, produces large but bitter leaves and encourages rapid bolting. In hot climates, provide afternoon shade using row covers or companion plant with taller crops like kale.
The biggest mistake gardeners make is planting too late in spring or too early in fall. Arugula bolts quickly when temperatures exceed 75°F for consecutive days. In zones 7-9, focus on fall and winter growing rather than fighting summer heat. Succession plant every 10 days during optimal weather windows to maintain continuous harvests.
Maximize yields by harvesting outer leaves when they're 2-3 inches long, leaving the growing point intact. This cut-and-come-again method extends harvests for 6-8 weeks per planting. If you notice flower buds forming, harvest immediately—the leaves become intensely peppery and tough once flowering begins.
Harvesting
Begin harvesting arugula when leaves reach 2-3 inches long, typically 21-25 days after sowing. Baby leaves offer the mildest flavor, while mature 4-5 inch leaves deliver maximum peppery intensity. Look for bright green color and crisp texture—yellowing or wilted edges indicate over-maturity.
Harvest in early morning when leaves are fully hydrated and crisp. Use clean scissors to cut outer leaves ½ inch above the soil line, leaving the central growing point and smaller inner leaves intact. This allows the plant to continue producing for weeks. Alternatively, harvest entire young plants by cutting at soil level for tender baby greens.
Test leaf maturity by gently bending a leaf—properly mature leaves will snap cleanly rather than bend. Avoid harvesting wet leaves as they'll deteriorate quickly in storage. Once flower stalks appear, harvest immediately as leaves become increasingly bitter and tough. You can still eat flowering arugula, but expect an intensely peppery, almost radish-like bite that some find overwhelming in fresh applications.
Storage & Preservation
Fresh arugula keeps best when stored unwashed in the refrigerator. Wrap loosely in paper towels, then place in a perforated plastic bag in the crisper drawer. Properly stored arugula maintains quality for 7-10 days, though baby leaves deteriorate faster than mature ones.
Wash arugula just before use in cold water, spin dry gently, and use immediately for best flavor and texture. Unlike heartier greens, arugula doesn't freeze well fresh due to its delicate structure.
For preservation, try making arugula pesto—the oil protects the leaves' flavor and texture better than other methods. Blanch mature leaves for 30 seconds, then freeze in ice cube trays with olive oil for cooking applications. Dehydrating works for mature leaves; dry at 95°F until crisp, then crush for a peppery seasoning salt. Fermented arugula adds complex spicy notes to kimchi-style preparations when mixed with heartier vegetables.
History & Origin
Arugula (Eruca vesicaria sativa) traces its roots to the Mediterranean basin, where it has grown wild for millennia. Ancient Romans prized it as both food and medicine, believing it possessed aphrodisiac properties—they scattered the peppery leaves on floors during wedding ceremonies and cultivated it in monastery gardens alongside other medicinal herbs.
The variety we grow today represents centuries of selection by Italian farmers, particularly in regions like Lazio and Veneto, who developed the deeply lobed leaf forms and intense peppery flavor profiles. Italian immigrants brought seeds to America in the late 1800s, but arugula remained largely within ethnic communities until the 1990s gourmet food movement.
As an heirloom variety, arugula maintains its original wild characteristics—rapid growth, self-seeding ability, and that distinctive sharp bite that distinguishes it from milder salad greens. Its resurgence in American gardens coincides with the farm-to-table movement and increased appreciation for bold, distinctive flavors in simple preparations. Today's gardeners grow essentially the same variety Roman soldiers carried as trail rations two thousand years ago.
Advantages
- +Exceptional cold tolerance—survives temperatures down to 25°F with minimal protection
- +Self-seeds reliably, creating sustainable garden patches with minimal intervention
- +Naturally pest-resistant due to peppery compounds that deter most insects
- +Harvests in just 3 weeks from seed, providing quick satisfaction for new gardeners
- +Cut-and-come-again harvesting extends productivity for 6-8 weeks per planting
- +Thrives in partial shade where lettuce and spinach struggle
- +Requires minimal fertilization compared to other leafy greens
Considerations
- -Bolts rapidly in temperatures above 75°F, limiting summer growing windows
- -Becomes intensely bitter and tough once flowering begins
- -Self-seeding can become weedy if not managed properly
- -Flea beetles can riddle young leaves with holes during peak pest seasons
- -Short storage life compared to hardier greens like kale or collards
Companion Plants
Plant Together
Basil
Repels aphids and flea beetles while improving arugula's flavor
Chives
Deters aphids and other soft-bodied insects that damage arugula
Lettuce
Similar growing requirements and compatible root systems
Spinach
Same watering needs and harvest timing, efficient space usage
Carrots
Deep roots don't compete with shallow arugula roots
Radishes
Quick harvest allows succession planting and breaks up soil
Marigolds
Repels flea beetles and aphids that commonly attack arugula
Nasturtiums
Acts as trap crop for flea beetles and aphids
Keep Apart
Brassicas
Attracts same pests like flea beetles and cabbage worms
Fennel
Releases allelopathic compounds that inhibit arugula growth
Strawberries
Different watering needs and may harbor slugs that eat arugula
Pests & Disease Resistance
Resistance
Excellent disease resistance. Very hardy and pest-resistant compared to other greens.
Common Pests
Flea beetles, aphids, caterpillars
Diseases
Downy mildew, white rust (rarely problematic)