Seed Depth: ¼–½ inch

Plant Spacing: 24–36 inches

Row Spacing: 36 inches

Sunlight: Full sun

Soil Temperature: 70°F+

Days to Sprout: 7–14 days

Days to Maturity: 90–120 days

Lifecycle: Annual (perennial in frost-free climates)

Sunlight: Full sun

Soil: Well-drained, fertile soil

Indoor Start: Start seeds 4–6 weeks before last frost in warm conditions; transplant outdoors after all danger of frost has passed

Direct Sow: Sow outdoors after last frost once soil has warmed to at least 70°F

Watering: Keep soil evenly moist, especially during hot weather

Thinning: Thin to the strongest plant if multiple seedlings emerge

Fertilization: Light feeding supports steady growth without excessive size

Mulching: Mulch helps retain moisture and regulate soil temperature

Leaf Harvest: Begin harvesting young leaves once plants are well established; snip outer leaves as needed to encourage continued growth

Calyx Harvest: Harvest calyces after flowers drop and calyces swell and turn deep red; cut calyces from stems once fully formed

Warm Temperatures: Plant only after consistent warmth arrives; cool soil or cool nights can slow growth significantly

Early Growth Pace: Expect slow early growth in cooler conditions, with rapid growth once summer heat sets in

Season Length: Roselle needs a long, warm growing season to fully mature and produce calyces, making early starts helpful in shorter-season areas

Continued Harvest: Harvest leaves regularly to encourage steady new growth and prolonged productivity