Growing Thai Chili Peppers: A Complete Profile
By Growing Home Greens Team · September 30, 2026
Thai chilies, also called bird’s eye chilies, are small, pointed and very hot. Baker Creek says this type is used in almost every Thai dish, and the fruit dries easily.
Heat and harvest
Bonnie Plants rates its Thai Hot at 50,000 to 100,000 Scoville units, with fruit about 2 inches long; Baker Creek’s Thai Red Chili runs about 1 inch. Bonnie lists at least 80 days after planting and Baker Creek 70 to 90 days.
Pretty enough for a pot
Bonnie sells it as an ornamental and Baker Creek describes plants loaded with bright red peppers. Size varies by variety: Bonnie lists it as short, under 24 inches, while Burpee gives its Thai Hot 36 inches. Either way it makes a good container pepper.
Start seed indoors about eight weeks before your last frost. One plant per square foot in the Garden Designer. Wear gloves when handling a big harvest. The Bell Pepper profile covers shared care, and the companion guide lists neighbors.
Hot nights and dropped flowers
Pepper flowers fall off without setting fruit when nights stay above about 75°F, per the University of Delaware’s Weekly Crop Update. In zones 9 and up, expect a midsummer gap in fruiting; our zone pages flag it.
Growing it next to other peppers
Different pepper varieties cross-pollinate easily, hot ones included. NC State Extension notes that when hot and sweet peppers cross, the heat shows up in later generations grown from saved seed, and suggests keeping varieties 20 to 30 feet apart if you plan to save your own. Baker Creek, which grows seed for sale, isolates varieties by at least 500 feet. If you buy fresh seed each year, you can plant sweet and hot peppers side by side.
Sources: Bonnie Plants, Thai Hot; Baker Creek, Thai Red Chili; Burpee, Thai Hot; NC State Extension, Saving Your Own Seed; University of Delaware Weekly Crop Update.
Companion planting guide for Thai Chili Pepper (Bird's Eye) · Find your planting dates
Typically viable in USDA zones 3-11. Not sure your zone? Look it up by ZIP code.
Mature height: 1.5-3 ft
Method: Start indoors: Start indoors from seed, then transplant outside. It needs a head start most zones can't give it by direct-sowing alone.
When to plant Thai chili pepper (bird's eye), by zone
Every zone Thai chili pepper (bird's eye) grows in. Pick your zone in the header and it will be highlighted here. Each zone links to its full page.
| Zone | Start indoors | Sow or plant out | Harvest |
|---|---|---|---|
| 3a & 3b | Apr 4–Apr 11 | Jun 13–Jun 20 | Sep 1–Sep 8 |
| 4a & 4b | Mar 20–Mar 27 | May 29–Jun 5 | Aug 17–Aug 24 |
| 5a & 5b | Mar 15–Mar 22 | May 24–May 31 | Aug 12–Aug 19 |
| 6a & 6b | Feb 28–Mar 7 | May 9–May 16 | Jul 28–Aug 4 |
| 7a & 7b | Feb 13–Feb 20 | Apr 24–May 1 | Jul 13–Jul 20 |
| 8a & 8b | Jan 28–Feb 4 | Apr 8–Apr 15 | Jun 27–Jul 4 |
| 9a & 9b | Dec 21–Dec 28 | Mar 1–Mar 8 | May 20–May 27 |
| 10a & 10bSpring window | Dec–Feb | Feb–Apr | ~80 days after transplanting |
| Summer window | May–Jul | Jul–Sep | ~80 days after transplanting |
| 11a & 11bSummer window | Jun–Dec | Aug–Feb | ~80 days after transplanting |
Harvest dates are about 80 days after the sow or plant-out date, not after starting seeds indoors.
See exact start-indoors, direct-sow, and harvest dates for your zone →
How many Thai Chili Pepper (Bird's Eye) plants fit per square foot?
Spacing: 1 per square foot (square-foot-gardening spacing). Mature height: 1.5-3 ft.
Soil & water: pH 6-6.5. Needs well-drained soil. Amend with lime if soil pH falls below 6.
Good companions for Thai chili pepper (bird's eye)
- Basil: Reputed to repel aphids and improve pepper growth nearby, but a controlled garden trial testing this same claim on a related crop found no pest-reduction benefit from basil, and found higher pest counts on the basil-companioned plants. Treat this pairing as unproven, not as a working pest deterrent.
- Onion: Reputed to deter many common pepper pests, though this specific pairing hasn't been tested the way onion/carrot pest-masking has. Treat it as garden tradition.
Full companion guide, including what to keep away from Thai chili pepper (bird's eye) →
Varieties worth considering
- Quickfire (F1) (best for: containers): A 2022 All-America Selections winner: a Thai-type hot pepper at about 40,000 Scoville units, with 1.7 inch fruit on a compact, bushy plant. Judges singled out the very large yield for such a small plant, which makes it a good pick for a pot. About 50 days from transplant. (source)
Why each variety is listed comes from the source shown next to it. We haven't grown these ourselves yet, so treat this as a research-backed starting point, not a personal endorsement. The buy links are separate from those sources: they go to seed suppliers that sell that exact variety, and we may earn a commission on some of them.
Where to buy Thai chili pepper seeds
Botanical Interests · True Leaf Market · Burpee (Thai chili pepper seeds)
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See it growing
Search YouTube for "growing Thai chili pepper (bird's eye)" videos → (a live search, not a hand-picked video; results vary and aren't vetted by us)
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Growing Thai Chili Pepper (Bird's Eye): Small, very hot bird's eye chiles on a bushy plant that doubles as an ornamental.
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