Planting timing · Cool-season
When to plant arugula
Plant arugula on the cited sheets — not on a national calendar month. Regional dates stay source-specific.
Growing guidance is general information. Timing, spacing, and care depend on cultivar, weather, soil, and local conditions. Check the sources and adjust the plan for your garden.
Spacing lives on the arugula hub. Timing stays on the cited sheets.
Types and spacing live on growing arugula.
What the sources say — at a glance
One source per card. Facts are not averaged.
Maryland Extension (Maryland)
Mid-March through May and August through September, direct seed. Maryland calendar — not a ZIP tool.
Details and limits (2)
Timing
Maryland Extension (Maryland): spring — mid-March through May, plant seeds directly. Fall — August through September, plant seeds directly. Maryland calendar — not a ZIP tool.
Limit
Maryland vegetable planting calendar. Direct-seed windows stay Maryland. Not a ZIP calendar.
Illinois Extension (Illinois)
Direct sow early spring to early fall. Illinois timing — not a national plant date.
Details and limits (2)
Timing
Illinois Extension (Illinois): seed sown directly in the ground in early spring to early fall. Illinois timing — not a national plant date.
Limit
Illinois Good Growing arugula page. Early-spring to early-fall timing stays Illinois. Not a ZIP calendar.
Sources differ
Make it yours
Save the bed in the Field Book so next season is not a guess.
Verified suppliers only
No supplier on this page
When a partner is listed, it will be outbound and disclosed. Nothing to buy here. Fertilizer, soils, and pesticides stay off this slot.
When do you plant arugula?
Compare timing on the cited sheets. Maryland: mid-March through May and August through September, direct seed. Illinois: direct sow early spring to early fall.
Do the sheets agree on a window?
No. Maryland names mid-March through May and August through September. Illinois names early spring to early fall. Two cards — not averaged.
What to record in the Field Book
Save the bed with the crop and the date. You may add a photo and notes. Compare entries you have recorded with each other — not with a diagnosis from this page. If you want an identification, bring the record to local Extension.
How we know — methodology. Ranges and assertions are cited per source, not blended.