Hieracium abscissum, or Rusby's hawkweed, is a perennial herb native to parts of South America, known for its yellow, dandelion-like flowers.
At-a-glance light, water, soil, and growing conditions from plant data
Full Sun to Partial Shade
75% intensity
Prefers at least 6 hours of direct sunlight daily for best flowering.
Moderate
50% intensity
Keep soil consistently moist but not waterlogged.
Well-drained, Sandy, Loamy, Clay
50% intensity
Hardy Perennial
50% intensity
Thrives in moderate temperatures; generally hardy in USDA zones 3-8.
Low
25% intensity
Occasional light feeding in spring is sufficient; avoid over-fertilizing.
Safety information from plant toxicity data
| Attribute | Value |
|---|---|
| Toxic for humans | No 0/5 intensity |
| Toxic for pets | No 0/5 intensity |
Non-toxic
Key traits and growing stats from plant data
Watering, pruning, propagation, and repotting details from plant data
Rusby's hawkweed prefers consistently moist soil but can tolerate short periods of drought once established. Water deeply when the top 2-3 cm of soil feels dry.
Avoid overwatering, which can lead to root rot, especially in poorly draining soils. Reduce watering during winter dormancy.
Deadhead spent flower stalks to encourage more blooms and prevent self-seeding if desired. Remove any yellowing or damaged foliage as it appears to maintain a tidy appearance.
Light pruning in late winter or early spring can help shape the plant and remove dead material.
Rusby's hawkweed can be propagated by division of established clumps in spring or autumn. Seeds can also be sown in spring or fall.
It readily self-seeds in suitable conditions, making it easy to spread in a garden setting.
As a perennial that spreads, repotting is typically done when dividing larger clumps. This is best performed in early spring before new growth begins.
Ensure the new pot or location has well-draining soil to prevent waterlogged conditions around the roots.
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Monthly activity intensity for bloom and fruit across both hemispheres.
Flowering & fruiting calendar
Flowering & fruiting calendar
Photos of Rusby's Hawkweed (Hieracium abscissum)
Common names and botanical synonyms
Botanical classification
| Rank | Name |
|---|---|
| Kingdom | Plantae |
| Division | Tracheophyta |
| Class | Magnoliopsida |
| Order | Asterales |
| Family | Asteraceae |
| Genus | Hieracium |
| Species | Hieracium abscissum |
Similar in genus Hieracium
Answers based on plant encyclopedia data
