Rhubarb

Rheum x hybridum

A rhizome. A stem that grows sideways at or just below the soil, with nodes that make shoots above and roots below.

Whole

Cut open

Store	Rhizome. Grows horizontally and is segmented, with a shoot at the growing tip.
Depth	2-3 cm to the base of the rhizome
Spacing	90 cm apart
When	Plant in spring. Plant: 4 weeks before up to your last spring frost. Work out your dates.
Pets	Toxic to Dogs, Toxic to Cats, Toxic to Horses (ASPCA)

About Rhubarb

A thick crown with buds. Leaves are poisonous (oxalate); eat only the stalks.

Depth and spacing

Typical range: 2-3 cm deep and 90 cm apart. A general rule is to plant at two to three times the height of the rhizome; check the label for your variety. The drawing is to scale for 2.5 cm deep and 90 cm apart (the size of the organ is illustrative); try your own measurements.

When to plant

Plant in spring. Plant: 4 weeks before up to your last spring frost. These are rules of thumb for the northern hemisphere. Enter your frost dates for real dates.

Dividing and propagating

Divide crowns in autumn or early spring, each piece with at least one bud. Do not harvest in the first year.

Lifting and storing

Not stored; replant at once.

Toxic to Dogs, Toxic to Cats, Toxic to Horses

The ASPCA lists Rheum rhabarbarium as: toxic to dogs, toxic to cats, toxic to horses. Toxic principle: Soluble calcium oxalates. Signs: Kidney failure, tremors, salivation. If your pet has chewed any part, call your vet or an animal poison helpline. ASPCA entry.