Roselle
Also known as: Hibiscus sabdariffa · Jamaica sorrel · Florida cranberry · Sour tea
When & where
Germination
Spacing & depth
How to plant
Start indoors on heat — Roselle needs a long hot season. Transplant after nights stay above 55°F. Plants reach 5–7 ft, branching heavily. Flowers open a single morning; the fleshy red calyxes swelling behind each flower are the harvest. Snap calyxes off when plump but before they dry — usually mid-fall.
Pre-sow treatment
Nick or scarify the hard seed coat and soak 12 hours in warm water to speed germination.
Grower's tip
The tart ruby-red calyxes make Jamaica agua fresca, hibiscus tea, jam, and syrup. Young leaves are a lemony cooked green. Frost kills it — harvest everything before the first cold night.
Soil preferences
Deep, rich, well-drained soil with high organic matter.
6.0–6.8 for most; strawberries and blueberries prefer 4.5–6.0.
Compost annually; mulch with wood chips for perennial fruits.
Watering
1–2 in per week; deeper as plants establish.
Soak the root zone, not the foliage. Drip irrigation is ideal for long-lived plantings.
Overwatered: fruit split, root rot, mushy fallen fruit. Underwatered: shriveled berries, dropped flowers, sunscald.
Prefers top-watering — Top-water deeply at the base in the morning. Wet leaves at night cause blackspot and powdery mildew.
Temperature tolerance
70–85°F (21–29°C)
55–70°F (13–21°C)
Tropical fruits (passionfruit, pepino, naranjilla) frost-tender. Temperate fruits (pomegranate, fig, sea buckthorn) tolerate hard freezes once established.
Container growing
Possible with the right cultivar
10+ gal (38 L) for tree fruit; 3–5 gal for berry canes; 12 in deep for strawberries
Choose dwarf or patio cultivars for containers; overwinter tender types indoors.
Succession planting
Perennials fruit on their own schedule — no succession. For annual fruiting (tomatillo, ground cherry, roselle) treat like a warm-season vegetable.
Detailed harvesting
Pick fully ripe — fruit sweetens on the plant, not the counter. Test with a gentle tug; ripe fruit releases easily.
Post-harvest storage & preservation
Refrigerate soft fruit unwashed 3–7 days. Freeze on trays, then bag. Dehydrate slices at 135°F. Jam or preserve surplus.
Culinary, medicinal & other uses
Fresh eating, jam, wine, syrup, drying. Use imperfect fruit for cooking; keep the best for the table.
Medicinal or traditional uses are shared for interest only — this is not medical advice. Consult a qualified professional before using any plant medicinally.
Seed saving
Most perennial fruit are insect-pollinated and often not true-to-type from seed.
Named cultivars must be propagated by cutting, division, or graft to stay true.
Rinse seeds from ripe pulp; dry 1–2 weeks. Many need cold stratification before sowing.
Your zone's planting calendar
Pick your USDA hardiness zone and we'll estimate the key dates for roselle in your area. These are regional averages — always check your own last-frost forecast before sowing.
From your kitchen — grow roselle from what you already have
Save seed from the dry calyxes at the end of the season.
- 1Let some flowers stay unharvested — the calyxes swell around a green seed capsule.
- 2When the calyxes are dry and papery, split the capsule open.
- 3Tap out the round black seeds onto a tray.
- 4Store dry. Nick or soak before sowing next spring.
Storage: 3–4 years dry.
My Roselle notes
Roselle seeds on hand
Track packets and loose seeds you already have. Private to your account.
Par level — leave at 0 for no alert. Anything below par shows on Seed Starting and your shopping list.
Order more seeds
Running low? Reorder from one of these seed stores.
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