Cranberry Hibiscus - Key Growing Information

Cranberry Hibiscus 'Mahogany Splendor', prized by florists for its radiant red foliage.

DAYS TO GERMINATION:

3-5 days at 70-76°F (21-24°C)

SOWING:

Transplant (recommended) - Sow 6-8 weeks before planting out, 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:

40-70".

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 the 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