Cranberry Hibiscus - Key Growing Information
DAYS TO GERMINATION: 3-5 days at 70-76°F (21-24°C)
SOWING: Transplant (recommended) - 6-8 weeks before last frost, covering seed lightly. Transplant out after danger of frost has passed. Hibiscus is a heat-loving crop and benefits from use of a soil warming mulch, such as black plastic or black solar mulch.
LIGHT PREFERENCE: Sun. Hibiscus thrives in heat and humidity so is best grown in full sun.
PLANT HEIGHT: 48-70".
PLANT SPACING: 24-36".
HARDINESS ZONES: Zones 8-9.
STEM LENGTH: 12-70". Pinching is not required but if plants are pinched at a young stage, lateral branches will benefit greatly in length and quality.
HARVEST: For cut foliage, harvest once leaves are mature (not tender) and stems are straight, firm, and at least slightly woody.
SOIL REQUIREMENTS: Well drained but moist soil with high organic matter. Preferred pH of 5.8-6.5.
NOTE: Foliage will have green/ rust tones in the greenhouse, but mature to burgundy in full sun outdoors.
SCIENTIFIC NAME: Hibiscus acetosella
ALTERNATE NAMES: False Roselle, African Rose Mallow