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Description
Hibbertia Obtusifolia, commonly known as blunt-leaf guinea flower, is a perennial plant that belongs to the family Dilleniaceae. It is native to Australia, where it grows in sandy or gravelly soils in open forests, heathlands, and grasslands. The plant produces yellow or orange flowers that bloom from spring to summer, attracting bees and other pollinators.
Taxonomic Information
| Domain | Eukaryota |
|---|---|
| Kingdom | Plantae |
| Phylum | Tracheophyta |
| Class | Magnoliopsida |
| Order | Dilleniales |
| Family | Dilleniaceae |
| Genus | Hibbertia |
Appearance
Hibbertia Obtusifolia is a low-growing and spreading plant that can reach up to 30 cm in height and 1 m in width. It has small, oval-shaped leaves that are about 1 cm long and 5 mm wide, with blunt tips and a glossy green color. The flowers are about 2.5 cm in diameter, with five petals that are bright yellow or orange and a prominent central boss of stamens. The plant produces small, round fruits that contain several black seeds.
Care Guide
Hibbertia Obtusifolia is a relatively easy plant to care for, as long as its basic needs are met.
Water
The plant prefers well-drained soils and moderate watering, especially during hot and dry periods. Avoid overwatering, as it can lead to root rot and other fungal diseases.
Fertilization
The plant does not require fertilization, but you can add a slow-release fertilizer in early spring to promote growth and flowering.
Soil
The plant prefers sandy or gravelly soils that are slightly acidic to neutral (pH 6.0-7.0). If your soil is heavy or clayey, you can amend it with sand, perlite, or other organic matter to improve drainage.
Sunlight
The plant prefers full sun to partial shade, but it can tolerate some shade, especially in hot and dry climates.
Hardiness Zones
The plant is hardy in USDA zones 9-11, where the minimum winter temperature is about 20-40°F (-7 to 4°C). In colder climates, you can grow the plant as an annual or in a container that can be moved indoors during winter.
Common Pests & Diseases
Hibbertia Obtusifolia is generally resistant to pests and diseases, but it can be affected by some common problems such as:
- Aphids: small, soft-bodied insects that suck plant sap and excrete honeydew, causing stunted growth and deformation of leaves and flowers. You can control aphids by spraying the plant with water or insecticidal soap, or by introducing natural predators such as ladybugs or lacewings.
- Spider mites: tiny arachnids that feed on plant cells, causing yellowing, browning, and drying of leaves. You can control spider mites by spraying the plant with water or neem oil, or by introducing natural predators such as predatory mites or thrips.
- Fungal diseases: such as root rot or leaf spot, can occur if the plant is overwatered or exposed to humid conditions. You can prevent fungal diseases by avoiding overhead watering, providing good air circulation, and removing infected plant parts.
Habitat
Hibbertia Obtusifolia is native to eastern and southeastern Australia, where it grows in a variety of habitats such as:
- Open forests and woodlands
- Heathlands and shrublands
- Grasslands and savannas
- Rocky outcrops and cliffs
The plant is adapted to sandy or gravelly soils that are low in nutrients and moisture, and it can tolerate drought, fire, and grazing by animals such as kangaroos or rabbits.
Question and Answer
Q: Is Hibbertia Obtusifolia a good plant for containers?
A: Yes, you can grow Hibbertia Obtusifolia in a container as long as it has good drainage and receives enough sunlight. Keep in mind that the plant can spread quickly and may need to be pruned regularly to maintain its shape.
Q: How often should I water Hibbertia Obtusifolia?
A: Hibbertia Obtusifolia prefers moderate watering, especially during hot and dry periods. Water the plant when the top inch of soil feels dry to the touch, but avoid overwatering, as it can lead to root rot and other fungal diseases.
Q: Can I propagate Hibbertia Obtusifolia from cuttings?
A: Yes, you can propagate Hibbertia Obtusifolia from stem cuttings taken in spring or summer. Dip the cuttings in rooting hormone and plant them in a well-draining soil mix. Keep the soil moist and provide bright, indirect light until the cuttings have rooted.
Q: What is the best time to prune Hibbertia Obtusifolia?
A: You can prune Hibbertia Obtusifolia in winter or early spring, before new growth appears. Remove any dead, damaged, or diseased branches, as well as any shoots that are crossing or crowding the plant. You can also shape the plant by cutting back the tips of the stems.
Related Plants
- Hibbertia aspera
- Hibbertia scandens
- Hibbertia serpyllifolia
- Hibbertia stellaris
References
- https://www.anbg.gov.au/gnp/interns-2006/hibbertia-obtusifolia.html
- https://www.gardeningwithangus.com.au/hibbertia-obtusifolia-blunt-leaf-guinea-flower/
- https://www.australianplantsonline.com.au/hibbertia-obtusifolia.html
- https://www.gardeningknowhow.com/ornamental/flowers/hibbertia-guinea-flower/growing-guinea-flowers.htm
