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Geek Guides Plant Guide Hibiscus rosa-sinensis 'Granny's Diamonds'
Geek Guides Plant Guide Hibiscus rosa-sinensis 'Granny's Diamonds'
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Hibiscus rosa-sinensis 'Granny's Diamonds'
Pronunciation: hi-BIS-kus RO-sa-sy-NEN-sis
Family: Malvaceae
Cultivar: Granny's Diamonds
Common Name: Granny's Diamonds Tropical Hibiscus, Chinese Hibiscus
Plant Type:
- trees, shrubs
Height to: 15'
Width to: 10'
USDA Hardiness Zones:
- 30 to 20ºF ZONE 9
- 40 to 30ºF ZONE 10
- 50 to 40ºF ZONE 11
- 60 to 50ºF ZONE 12
Bloom Description: Granny's Diamonds Tropical Hibiscus (Hibiscus rosa-sinensis) bears beautiful ruffled blooms that are red in the center and turning rust and then exploding into a deep yellow with rusty speckles along the edges.
Bloom Season:
- repeat bloomer
Sun Exposure:
- full sun
Soil Type: Granny's Diamonds Tropical Hibiscus (Hibiscus rosa-sinensis) prefers humus rich, moist soil
Pests and Diseases: Granny's Diamonds Tropical Hibiscus (Hibiscus rosa-sinensis) is susceptible to rust, fungal leaf spot, bacterial blight, Verticillium wilt, viruses and stem and root rot. Whiteflies, aphids, mealybugs, scale insects, mites, Japanese beetles, caterpllars
Propagation: Sow Granny's Diamonds Tropical Hibiscus (Hibiscus rosa-sinensis) seed at 55-64ºF/13-18ºC in spring. Seeds that are open pollinated do not come true to parent. Root greenwood cuttings in late spring, or semi ripe cuttings in summer. Layer in spring or summer.
Winter Sowing Zones: None
Notes:
Granny's Diamonds Tropical Hibiscus (Hibiscus rosa-sinensis) Care: When grown under glass grow in soilless or soil based potting mix in bright filtered light. Provide moderate humidity and good ventilation. In the growing season, water freely and apply a balanced fertilizer monthly; water sparingly in winter.
Source: Various resources including The American Horticultural Society A to Z Encyclopedia of Garden Plants
USDA Heat Zones (days above 86ºF):
- Less then 1 day ZONE 1
- 1 to 7 days ZONE 2
- 7 to 14 days ZONE 3
- 14 to 30 days ZONE 4
- 30 to 45 days ZONE 5
- 45 to 60 days ZONE 6
- 60 to 90 days ZONE 7
- 90 to 120 days ZONE 8
- 120 to 150 days ZONE 9
- 150 to 180 days ZONE 10
- 180 to 210 days ZONE 11
- Greater then 210 ZONE 12
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