Plants
Welsh onion
Allium fistulosum L.
Family: Amaryllidaceae · Genus: Allium
spring onion, scallion
Perennial clumping Allium widely used as a culinary herb. Pasini lists it in the high stratum of Tabela 3 (Brazilian use is in the low stratum). Propagates by clump division; yields indefinitely.
Götsch succession
- Götsch stage
- Placenta I
- Ecological role
- Pioneer
- Primary stratum
- Ground cover
- Strata
- Ground cover
- Biomass class
- No biomass production
Environment
- Light requirement
- Full sun
- Water requirement
- Moderate
- Drought tolerance
- Moderate
- Soil pH range
- 6–7
- Preferred soil texture
- Sandy, Loamy
Morphology
- Mature height
- 0.2–0.5 m
- Root system
- Fibrous
- Root depth
- Shallow
- Growth rate
- Very fast
- Lifespan
- ≤ 3 years
- Time to first harvest
- 3 months
Biomes & climate
- Atlantic Forest Suitable
- Cerrado Suitable
Köppen classes
- Tropical savanna with dry winter (Aw) Suitable
- Subtropical with dry winter (Cwa) Suitable
- Humid subtropical (Cfa) Suitable
Where it fits in a guild
Welsh onion takes the Ground cover stratum in the Placenta I phase of succession — in a guild it shares the line with species from the other strata, each harvesting light at its own height, in its own time.
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❓ Frequently asked questions
How long until the first harvest of Welsh onion?
The first harvest of Welsh onion comes around 3 months after planting.
How tall does Welsh onion grow?
At maturity, Welsh onion reaches 0.2–0.5 m tall.
What stage and stratum does Welsh onion occupy in a syntropic system?
In a syntropic system, Welsh onion belongs to the placenta i stage, occupying the ground cover stratum.
Functions
Propagation
Seed, Division
Citations
- Pasini, F. & Guimarães, L. (2017) — Tabela 3 (Incaper) , p. 116 (primary_stratum)
- PFAF Plant Database — Allium fistulosum (ph_min, ph_max, soil_texture_preference, light_need, root_depth)
External references
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