Growing Roselle: A Complete Profile
By Growing Home Greens Team · August 20, 2026
Roselle is grown for the fleshy red calyx left behind when the flower drops, which is what red hibiscus tea is made from. Almost everything about its timing is late.
It flowers in October
NC State Extension puts blooming from mid to late October, with fruit maturing through November and December. That is not a typo and it is not a warm-climate quirk you can plan around: the plant is daylength sensitive and will not flower until the nights lengthen. In a short season it makes a large handsome shrub and then frost takes it before anything is harvestable.
That is why our calendar starts it indoors early and why it is worth the eight-week head start.
Shrub scale, not herb scale
It reaches four to seven feet and wants three to six feet of space, so this is a plant for the end of a bed or a bed of its own rather than a square among the vegetables. It will not grow at all without full sun.
More of it is edible than you would expect
The leaves, flowers, calyces, roots and seeds are all edible. The leaves are tart and used as a green in West African and Caribbean cooking, so a plant that fails to flower in time is not a total loss.
In zones 8 through 11 it survives the winter and returns; in zones 3 through 7 it is a fast-growing annual. Our entry models it as an annual so it keeps zone pages across that whole range.
Source: NC State Extension Gardener Plant Toolbox, Hibiscus sabdariffa.
Companion planting guide for Roselle · Find your planting dates
Typically viable in USDA zones 3-10. Not sure your zone? Look it up by ZIP code.
Mature height: 4-7 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 roselle, by zone
Every zone roselle 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 | Nov 10–Nov 17 |
| 4a & 4b | Mar 20–Mar 27 | May 29–Jun 5 | Oct 26–Nov 2 |
| 5a & 5b | Mar 15–Mar 22 | May 24–May 31 | Oct 21–Oct 28 |
| 6a & 6b | Feb 28–Mar 7 | May 9–May 16 | Oct 6–Oct 13 |
| 7a & 7b | Feb 13–Feb 20 | Apr 24–May 1 | Sep 21–Sep 28 |
| 8a & 8b | Jan 28–Feb 4 | Apr 8–Apr 15 | Sep 5–Sep 12 |
| 9a & 9b | Dec 21–Dec 28 | Mar 1–Mar 8 | Jul 29–Aug 5 |
| 10a & 10b | Dec 5–Dec 12 | Feb 13–Feb 20 | Jul 13–Jul 20 |
Harvest dates are about 150 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 Roselle plants fit per square foot?
Spacing: about 10 square feet per plant (square-foot-gardening spacing). Mature height: 4-7 ft.
Varieties worth considering
- Victor (best for: Florida gardens): Selected in 1906 from seedlings at the Subtropical Garden in Miami, and the variety UF/IFAS Extension names as a good choice for South Florida. Julia Morton's Fruits of Warm Climates describes it as taller and more robust than 'Rico', to about 7 feet, with calyces as long as Rico's but slimmer and more pointed. (source)
- Rico (best for: the biggest calyx harvest): Named in 1912, a lower, spreading plant with calyces up to 2 inches long. Julia Morton's Fruits of Warm Climates calls it the highest yielder of calyces per plant, the part used for tea, jelly and sauce. (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 roselle seeds
True Leaf Market (each supplier's roselle seeds)
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See it growing
Search YouTube for "growing roselle" videos → (a live search, not a hand-picked video; results vary and aren't vetted by us)
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Growing Roselle: The hibiscus behind red hibiscus tea, harvested for its calyces in late autumn on a plant that reaches seven feet.
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