Arkansas planting calendar

When to plant swiss chard in Arkansas — sow, transplant & harvest dates

Arkansas is mostly USDA zone 7b (range 6b-8a). Dates below are derived from swiss chard's frost tolerance and Arkansas's frost window — not generic national averages.

Swiss Chard planting timetable for Arkansas

Stage	When in Arkansas	Anchor
Start seeds indoors	early March (March 8)	4 weeks before the last frost (early April)
Transplant outside	late March (March 29)	7 days before the last frost (early April)
First harvest (estimate)	late May (May 23)	~55 days from transplant

Dates are state-wide averages for the dominant zone. Local microclimates — elevation, urban heat, coastal moderation — can shift the window by 1-2 weeks. Use the frost-date calculator for a date tuned to your town.

Why Arkansas's climate shifts the swiss chard dates

Arkansas's last spring frost averages early April and first fall frost late October, which sets the whole planting clock. Arkansas has a warm, humid, long season with mild winters. The Ozarks run a half zone cooler than the southern lowlands. Sow early — swiss chard bolt once daytime temperatures hold above 24 °C, so the earlier they go in, the longer the harvest.

Swiss chard is notably more versatile than spinach — it tolerates both light frost (surviving to about -4 °C) and summer heat up to 32 °C, making it a near-year-round crop in Zones 7–10. Direct-sow or transplant 1 week before the last spring frost; chard seed is actually a multi-germ cluster, so thin to final spacing after germination to prevent overcrowding. Unlike spinach, it does not readily bolt in summer, so a single sowing can be harvested by cutting outer leaves repeatedly for 3–4 months.

Frost-risk note

Don't plant before early April — a hard freeze can still set young plants back. In the Ozark and Ouachita highlands (zone 6b) the safe date runs a week or two later.

Regional variation within Arkansas

the Ozark and Ouachita highlands (zone 6b) runs roughly 1-2 weeks behind the state average; the southern and Delta lowlands near Little Rock (zone 8a) can plant 1-2 weeks earlier.

Little Rock — USDA zone 8a
Fayetteville — USDA zone 7a
Fort Smith — USDA zone 7b
Jonesboro — USDA zone 7b

What else to plant in Arkansas around then

The same early window suits peas, lettuce, spinach, and onion sets.

Quick-grow guide

Sun: Full sun to partial shade.
Soil temperature for germination: 10-29 °C (50-85 °F).
Spacing: 9-12 inches (23-30 cm) between plants.
Days to harvest: ~55 days from planting out.

Frequently asked questions

When is the best time to plant swiss chard in Arkansas?

In Arkansas (mostly USDA zone 7b), sow swiss chard indoors around early March, transplant outdoors late March (before the last frost, early April), and harvest from late May. Swiss Chard are half-hardy — young plants shrug off a light frost but not a hard freeze, so sowing can start a couple of weeks before the last spring frost.

What USDA zone is Arkansas?

Most of Arkansas sits in USDA hardiness zone 7b, with the state spanning roughly 6b-8a from the Ozark and Ouachita highlands (zone 6b) to the southern and Delta lowlands near Little Rock (zone 8a). The last spring frost averages early April and the first fall frost late October.

Can you grow swiss chard in Arkansas?

Yes. Arkansas's dominant zone 7b supports swiss chard — the key is timing. Swiss Chard are half-hardy — young plants shrug off a light frost but not a hard freeze, so sowing can start a couple of weeks before the last spring frost.

Does the planting date change across Arkansas?

the Ozark and Ouachita highlands (zone 6b) runs roughly 1-2 weeks behind the state average; the southern and Delta lowlands near Little Rock (zone 8a) can plant 1-2 weeks earlier.

What else can I plant in Arkansas around the same time?

The same early window suits peas, lettuce, spinach, and onion sets.

Source and methodology

State zone spans from the USDA Plant Hardiness Zone Map (2023); frost-date averages from NOAA Climate Data Online. Hot-state two-season timing cross-checked against the UF/IFAS Florida Gardening Calendar and the University of Arizona Cooperative Extension planting calendar. Curated by the Growli editorial team.