When to Plant Arugula: Spring and Fall Dates by Region
Arugula grows fast and bolts in heat, so the sowing date decides most of the crop. Here’s when to plant arugula in spring and fall, and how soil temperature and region shift the date.
In most US gardens, the best time to plant arugula is early spring, once soil reaches 40°F. That’s often several weeks before the last frost. Sow again from late summer until 3 to 4 weeks before the first fall frost.
When to Plant Arugula Seeds in Spring
Sow arugula as soon as your soil can be worked in spring. University of Wisconsin-Madison Extension says arugula tolerates frost, so Wisconsin gardeners can sow it several weeks before the last spring frost. Its seed also sprouts within a few days in cool soil.
Early sowing matters for a second reason. Arugula bolts as days grow long and hot. So a crop sown early gets more cool weeks to make leaves before it flowers.
The South works a little differently. Clemson Extension prefers transplants for spring greens such as arugula in South Carolina, because seed germinates slowly in cool spring soil there. It suggests starting seeds indoors 6 to 8 weeks before your planting date.
Soil Temperature Sets the Start Date
Arugula needs soil of at least 40°F to sprout. The Northeast Crop Production and Harvest Manual, published with support from USDA’s SARE program, says arugula won’t germinate below that point. Its data also shows how quickly emergence speeds up as soil warms.
| Soil temperature | Days for arugula to germinate |
|---|---|
| 40°F | 23 |
| 50°F | 5 |
| 60°F | 3 |
| 70°F | 2 |
| 75°F | 1 |
Source: SARE, Northeast Crop Production and Harvest Manual (2025).
The jump from 40°F to 50°F is the part to use. Say your arugula bed reads 40°F today and should reach 50°F within a week. Sow now, and seedlings need about 23 days. Wait a week instead, and they appear about 12 days from today: 7 days of waiting plus 5 to sprout.
Check the temperature at seed depth before you sow. These steps for measuring soil warmth before planting work the same way for arugula.
How Much Cold Can Arugula Take?
Arugula handles light frost, but sources split on how far that goes. UW-Madison Extension says it tolerates frost. UC Master Gardeners of Santa Clara County say it withstands light frosts. Clemson Extension is stricter for South Carolina. It says to harvest arugula before freezing temperatures arrive, since it doesn’t tolerate frost.
Read together, they point to one practical rule. Plan around a hard freeze, not the first light frost. In spring, keep a row cover handy if a hard freeze shows up in the forecast. In fall, take your last big cutting before the first hard freeze.
Planting Arugula for a Fall Crop
Start fall sowings once summer nights cool down. SARE’s Northeast manual puts that point in August through September across the northern United States. It sets the last arugula sowing at 3 to 4 weeks before the first fall frost.
Fall also brings fewer pests. After the flea beetle’s third generation, around September 1, the same manual says Northeast fall arugula needs no protection. Shorter, cooler days also remove two of the bolting triggers UW-Madison Extension names.
Late summer soil can run hot and dry at the surface. So keep the seedbed evenly moist until seedlings show.
Worked Example: Find Your Last Fall Sowing Date
Start with your average first fall frost date. Your county extension office can give you the local figure.
Last arugula sowing = first fall frost date minus 21 to 28 days (SARE’s 3 to 4 weeks)
- Say your first fall frost averages October 15.
- October 15 minus 28 days is September 17.
- October 15 minus 21 days is September 24.
- So your last arugula sowing falls between September 17 and September 24.
That late sowing gives baby leaves, not full plants. UW-Madison Extension puts the first whole-plant cut at 3 to 4 weeks. For full-size leaves, Clemson Extension’s South Carolina figure is 45 to 60 days to maturity. With the same October 15 frost, that means sowing between August 16 and August 31. Treat it as a starting point outside South Carolina.
Arugula Planting Windows by Region
Region shifts the calendar. The North gets spring and fall crops, while Florida gets one long fall through spring season. Each source’s dates were checked in October 2026.
| Region | Spring sowing | Fall sowing | Source |
|---|---|---|---|
| Wisconsin | Several weeks before last spring frost | Every 2 to 3 weeks into fall | UW-Madison Extension |
| Northern US | As soon as the ground is ready | Aug. to Sept., until 3 to 4 weeks before first frost | SARE |
| SC Piedmont | Mar. 12 to June 30* | July 15 to Sept. 30* | Clemson Extension |
| SC Coastal Plain | Feb. 1 to June 15* | Aug. 1 to Oct. 30* | Clemson Extension |
| North and Central Florida | Through March | From September | UF/IFAS Extension |
| South Florida | Through March | From October | UF/IFAS Extension |
| Santa Clara County, CA | Direct seed Mar. to May | Direct seed Aug. to Oct. | UC Master Gardeners |
*Clemson’s dates are transplanting windows for greens as a group, arugula included. Since warm weather makes arugula bolt, the early part of each spring window suits it best.
Hardiness zones don’t set these dates. A USDA zone describes winter cold, not when spring frost ends. That’s why frost dates drive the order for planting cool-season and warm-season crops. In zone 6b, this month-by-month schedule for zone 6b shows where cool-season greens fit.
Why Summer-Sown Arugula Bolts
Summer sowings usually bolt before they make much leaf. UW-Madison Extension names three triggers: long days, high temperatures, and dry soil. Any of them can push arugula to send up a flower stalk 2 to 3 feet tall. UF/IFAS Extension adds that high temperatures make arugula flower and turn bitter.
That’s why SARE’s Northeast manual advises against late spring sowings that would mature in summer. To find your own cutoff, count back from when steady heat usually arrives. For example, say steady heat usually sets in around June 15. A sowing between May 18 and May 25 still leaves UW-Madison’s 3 to 4 weeks for a first cut.
If you sow in summer anyway, give the bed light afternoon shade. UW-Madison Extension says light shade may slow bolting during the hottest part of the season. Keep the soil evenly moist too, since dry soil is one of the triggers.
Seeding Arugula: Depth, Spacing, and Soil
Sow arugula seed about 1/4 inch deep. SARE’s Northeast manual uses 1/4 inch. Clemson Extension allows 1/4 to 1/2 inch in South Carolina. It warns that seed sown deeper than 1/2 inch likely won’t come up.
Spacing depends on what you plan to pick, and sources give a wide range:
- UW-Madison Extension, Wisconsin: thin to 3 to 6 inches for single plants, or leave a dense stand for cut-and-come-again picking
- UF/IFAS Extension, Florida: 3 to 4 inches between plants
- Clemson Extension, South Carolina: 9 inches for full-size plants
Dense stands suit baby leaves. Wider spacing suits full rosettes. For soil, Clemson suggests a pH of 6.0 to 6.5 for South Carolina greens, set after a soil test.
How Often to Sow Arugula Again
Sow a new round of arugula every 2 to 3 weeks. This is succession planting. Both UW-Madison Extension and UF/IFAS use that interval, Wisconsin from spring into fall and Florida from fall through spring. Each new round fills in as the last one starts to bolt.
Count your rounds from the season you have. Take a fall season that opens August 15 and ends with a last sowing on September 19. That’s 5 weeks. At a 2-week interval, you sow August 15, August 29, and September 12. At a 3-week interval, you sow August 15 and September 5. So that season holds 2 to 3 sowings.
Once seedlings are up, this guide to growing arugula from seedling to harvest covers day-to-day care.
When Is Arugula in Season?
Arugula is in season in spring and fall across most of the United States. In mild-winter areas, it runs from fall through spring instead.
UC Master Gardeners of Santa Clara County say arugula performs best planted in early spring or late fall. In Florida, UF/IFAS Extension lists sowing from September or October through March. In the North, that means a spring harvest before summer heat, then a fall harvest until a hard freeze.
Growing Arugula in Pots: Same Seasons, More Control
Pots follow the same cool seasons, but you can move them to stretch each one. University of Maryland Extension’s Salad Table grows greens, arugula among them, in a frame just 3 1/2 inches deep. You move it into sun in spring and fall, then out of summer sun and heat.
UMD’s Maryland figures help with container timing:
- One growth cycle runs about 8 weeks, from sowing to pulling plants.
- Arugula and other greens can be cut twice per cycle.
- You can plant one table 3 times a year.
- Thin seedlings to 1 to 2 inches apart.
UW-Madison Extension adds a winter option. Arugula grows in containers, even in winter on a bright windowsill. Whatever you use, make sure it has drainage holes.
What Does an Arugula Plant Look Like?
Arugula grows as a low rosette of dull green leaves 3 to 8 inches long, per UW-Madison Extension. Seedlings start with two rounded seed leaves, each notched at the tip. The first true leaves are smooth and narrow. Older leaves grow 4 to 10 lobes and look much like dark green oak leaf lettuce. Clemson Extension describes them as smooth and deeply lobed.
Bolting changes the plant fast. A single branched stalk shoots up 2 to 3 feet. Its creamy white flowers have four petals with purple to brown-red veins, and they measure 1/2 to 3/4 inch wide. The flowers are edible, with a milder taste than the leaves. Slim seed pods up to 1 1/2 inches long follow, and plants reseed readily if left in place.
That stalk is your timing signal. Once a center stalk appears, the leaf harvest is nearly over, so sow the next round. For flavor and plant family background, see what arugula is and how it tastes.
How to Harvest Arugula
Start picking when leaves are a couple of inches long. UW-Madison Extension gives two ways to harvest:
- Pick the outer leaves and leave the center growing.
- Cut the whole plant 1 to 2 inches above the soil in as little as 3 to 4 weeks, then cut the regrowth.
SARE’s Northeast manual also leaves 1 to 2 inches behind for regrowth. It suggests cutting in the morning, before the day’s heat builds. For cooking greens, it lets arugula reach 6 to 10 inches tall. In Florida, UF/IFAS harvests whole plants at 8 to 10 inches.
Pick often. UW-Madison Extension notes that regular harvests of small leaves help keep plants from going to seed. Older leaves taste stronger and more bitter, and drought and summer heat sharpen that flavor further.
How Long Until the First Harvest?
It depends on leaf size and region, and each source counts a little differently.
| Source and region | Time to harvest arugula | What it measures |
|---|---|---|
| UW-Madison Extension, Wisconsin | 3 to 4 weeks | First whole-plant cut |
| UF/IFAS Extension, Florida | 35 to 60 days | Seeding to harvest |
| Clemson Extension, South Carolina | 45 to 60 days | Sowing to maturity |
| UC Master Gardeners, Santa Clara County | 6 to 7 weeks | Germination to picking individual leaves |
Most of the spread comes from what each source measures. Baby leaves come first, and full rosettes take longer. So use the low end of these ranges for baby leaves and the high end for full-size plants.
FAQs about Arugula Planting Time
Can you plant arugula in October?
Yes, in mild-winter areas such as South Florida, where UF/IFAS lists October through March, and Santa Clara County, California. In colder regions, October usually falls past the last fall sowing date.
Can arugula survive frost?
Arugula usually survives a light frost, and UW-Madison Extension says it tolerates frost. Clemson Extension advises harvesting before freezing weather in South Carolina, so cut or cover plants before a hard freeze.
How late can you plant arugula in spring?
Stop sowing about 3 to 4 weeks before steady summer heat, which matches UW-Madison Extension’s time to a first cut. SARE’s Northeast manual advises against late spring sowings that mature in summer, when arugula bolts.
Should you start arugula seeds indoors?
Usually not in northern gardens, where UW-Madison Extension says arugula grows easily from seed, though transplants also work. In South Carolina, Clemson Extension prefers spring transplants started indoors 6 to 8 weeks before planting.
Can I grow arugula indoors in winter?
Yes, UW-Madison Extension says arugula grows in containers, even in winter on a bright windowsill. Sow a fresh pot every 2 to 3 weeks, its interval for outdoor beds, to keep young leaves coming.
Does arugula come back every year?
No, arugula is an annual, so each plant finishes once it flowers and sets seed. Still, UW-Madison Extension notes that it reseeds readily, so seedlings often return if you let a few plants drop seed.
Before You Plant
Find two dates first: your average last spring frost and your average first fall frost. Then check soil temperature at seed depth. Sow arugula once the soil holds 40°F, or wait for 50°F if that’s only days away. Stop spring sowings 3 to 4 weeks before summer heat. Then restart when nights cool, and make your last fall sowing 3 to 4 weeks before the first frost.
