Rhubarb

Rheum rhabarbarum

Layer 4 · Herbaceous
Edible companion

Status by region

No restrictions recorded in the lists we checked.

Checked against the European Union list (Regulation 1143/2014) · Portugal's national invasive species list (Decreto-Lei 92/2019).

Information based on the cited sources, not legal advice — always confirm your local rules.

About

Native to Asia, rhubarb is a robust herbaceous perennial valued for its edible petioles with a sour flavour. The leaves are toxic and must be discarded from human consumption. It occupies the herbaceous layer of the food forest in areas with partial shade and good moisture.

See which trees rhubarb grows well with

These trees share this species' soil and climate — the pairing is inferred from conditions, not from a guild we have already seen.

Cork oak

No account needed.

Needs

Water: Medium
Light: Partial shade
Size: Herbaceous up to 1 m
Mature diameter: 1 m
Soils: Loam, Clay
Climates: Atlantic coast, Inland / Continental, Mountain / cold

Calendar

January
February — Planting
March — Planting
April — Harvest — Planting
May — Harvest
June — Harvest
July
August
September
October — Planting
November — Planting
December

Harvest
Planting

Medicinal use: The petioles are consumed cooked in jams and desserts, but the leaf blades are toxic as they contain oxalic acid.

Where to buy

Central trees worth considering

May work well together — same soil and climate, complementary layers. We have not seen this combination in a generated guild yet.

Cork oak

May grow well with

Suggestions worked out from growing conditions — same soil and climate, complementary layers and functions. These are not observed guilds; treat them as a starting point to try on your own land.