How to grow turmeric
Curcuma longa · Zingiberaceae · Vegetable
When to plant turmeric: the short answer
Start seeds indoors about 8 weeks before your last spring frost; plant out about 3 weeks after it. Wait until the soil is at least 70°F; turmeric sprout fastest near 80°F.
Zone 5: plant out May 14 – May 31. Zone 7: plant out Apr 19 – May 6. Zone 9: plant out Mar 6 – Mar 23. See every zone.
Turmeric is a warm-season vegetable in the Zingiberaceae family, usually started indoors and set out as transplants. It wants partial shade — four to six hours of sun is enough and consistent moisture — it resents drying out. From sowing to first pick is about 240–300 days. It is killed by frost, so nothing goes outside until the danger has passed and the soil has warmed.
Grower’s note: Grown from a piece of fresh rhizome with a visible growth bud, cultured almost exactly like ginger and needing the same long, warm 8-10 month season to bulk up. Start indoors somewhere warm and humid, then move it to a large container outdoors for summer. The deep orange colour is already there in the young rhizome; dig the whole clump in fall once the leaves die back.
Sowing
Sow about 2″ deep, into soil between 70–95°F — germination is quickest near 80°F. It is slow and often erratic to germinate (14–42 days). For an early crop, start seed indoors about 8 weeks before your last spring frost and grow it under bright light.
Spacing & layout
Give each plant about 10″ along the row with roughly 18″ between rows. On a square-foot grid that is 1 per square foot. Allow at least 8″ of loose, workable soil for the roots. It grows well in containers at least 12″ deep.
Fitting it to your season
Turmeric needs roughly 240–300 frost-free days to crop. Where the season is shorter than that, start it indoors and choose the earliest-maturing varieties, or grow it in a container you can move under cover on cold nights. In long, hot-summer regions it can often be planted twice — once in spring and again in mid-to-late summer for a fall harvest.
Quick facts
Growth stages: how long turmeric takes to grow
From seed to first harvest takes roughly 45-54 weeks: about 11 weeks as a seedling indoors, then 240-300 days in the garden.
When to plant turmeric
When to plant turmeric by USDA zone
Dates worked out from each zone’s typical frost dates for 2026. Find your zone on the zone map, or pick your state below for dates from its own frost dates. Zones 11 and above are frost-free, so timing there depends on heat and rain instead.
| Zone | Last / first frost | Start indoors | Sow or plant out |
|---|---|---|---|
| Zone 3 | May 15 / Sep 15 | Mar 13 – Mar 27 | May 29 – Jun 15 |
| Zone 4 | May 10 / Sep 25 | Mar 8 – Mar 22 | May 24 – Jun 10 |
| Zone 5 | Apr 30 / Oct 5 | Feb 26 – Mar 12 | May 14 – May 31 |
| Zone 6 | Apr 15 / Oct 15 | Feb 11 – Feb 25 | Apr 29 – May 16 |
| Zone 7 | Apr 5 / Oct 25 | Feb 1 – Feb 15 | Apr 19 – May 6 |
| Zone 8 | Mar 20 / Nov 5 | Jan 16 – Jan 30 | Apr 3 – Apr 20 |
| Zone 9 | Feb 20 / Nov 30 | Dec 19 – Jan 2 | Mar 6 – Mar 23 |
| Zone 10 | Jan 30 / Dec 15 | Nov 28 – Dec 12 | Feb 13 – Mar 2 |
Companions
No strong companions recorded.
No strong antagonists recorded.
Common problems
Pests: aphids, spider mites, scale.
Diseases & disorders: rhizome rot, leaf spot.
Same family (Zingiberaceae)
Rotate these so they don’t follow each other in the same bed year to year.
Questions gardeners ask
When should I plant turmeric?
Start seeds indoors about 8 weeks before your last spring frost; plant out about 3 weeks after it. Wait until the soil is at least 70°F. The table on this page gives dates for each USDA zone, and the planting calendar gives dates for your own state or ZIP code.
How long does turmeric take to grow?
About 240-300 days from transplanting to the first harvest, or roughly 45-54 weeks from sowing the seed indoors. Seeds germinate in 14-42 days.
How much sun does turmeric need?
It needs about three to four hours of sun, ideally with shade in the afternoon.
What soil pH does turmeric need?
A soil pH between 5.5 and 6.5. It tolerates fairly acidic soil better than most vegetables. Test before adding lime or sulfur - see the soil pH and testing guide.
How far apart should I plant turmeric?
Space plants about 10 inches apart in rows 18 inches apart, or 1 per square foot in a square-foot bed. Sow seeds about 2 inches deep.
Can I grow turmeric in a container?
Yes. Use a container at least 12 inches deep with drainage holes and a good potting mix, and water more often than you would in the ground.
Figures are typical home-garden ranges from Cooperative Extension planting guides, cross-checked against multiple state sources. Your variety and conditions will vary.