Conyza floribunda
Asthmaweed · Bilbao Fleabane · Tall fleabane · Broad-leaved fleabane · Many-flowered fleabane
Description
Source: leafsnapErigeron sumatrensis (syn. Conyza sumatrensis) is an annual herb probably native to South America, but widely naturalised in tropical and subtropical regions, and regarded as an invasive weed in many places. In the British Isles it is known as Guernsey fleabane. Other common names include fleabane, tall fleabane, broad-leaved fleabane, white horseweed, and Sumatran fleabane.
🌳 Although not commonly noted for any particular commercial application, guernsey fleabane has drawn scientific attention because it exhibits notable resistance to some herbicides. This resistance may have implications for agricultural weed-management practices, prompting researchers to study guernsey fleabane to understand the mechanisms behind herbicide resistance and to potentially develop new approaches for managing resistant weed species in crop production systems.
Care Guide
💧 Water
☀️ Light Full sun
Guernsey fleabane grows best in locations that get plenty of sun year-round. Because it comes from habitats with abundant sunlight, insufficient light can restrict its growth. Although it is generally tolerant of a lot of sun, too much exposure can still cause damage.
🌡️ Temperature 15–35°C
Guernsey fleabane originates from habitats characterized by mild to warm temperatures and prefers conditions between 68 and 95 °F (20 to 35 ℃). Keeping temperatures within this range year-round will preserve its vitality.
💨 Humidity
🪴 Soil 5-7
🌱 Fertilizer
Guernsey fleabane does well with frequent, light applications of fertilizer to encourage healthy leaf growth. You should feed Guernsey fleabane about once a month during the summer. Nitrogen is important for foliage, and adding nitrogen-rich fertilizer helps Guernsey fleabane prosper.
🪴 Pot & Repot
✂️ Pruning
🌿 Propagating
🐛 Diseases & pets
☠️ Toxicity
Characteristics
- Plant Type
- Herb
- Life Cycle
- Annual
- Genus
- Conyza
- Family
- Asteraceae
- Hardiness Zone
- 7-9
- Mature Height
- 0.91 m to 2.13 m
- Mature Spread
- 30 cm to 61 cm
- Leaf Color
- Green
- Leaf Type
- Semi-evergreen
- Flower Color
- White, Yellow
- Flower Size
- 0.51 cm to 0.76 cm
- Bloom Time
- Mid spring, Late spring, Summer, Early fall
- Planting Time
- Spring, Autumn
- Harvest Time
- Late spring, Summer, Fall
- Native Area
- Colombia, Belize, Honduras, Guatemala, Bolivia, Venezuela, El Salvador, Nicaragua, Costa Rica, Panama