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Gardeners' glossary A-Z

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Use our easy-to-understand guide to help out with all those confusing gardening terms. From Acicular to Zebrinus, Annual to Zinc, you'll find a simple explanation below.

Root run

The area of soil taken up by a plant's roots.

Rootball

The matted roots and soil of a plant that can be seen when transplanting a pot plant, and which should be kept entire.

Rootstock

The plant on to which a scion from another specimen may be grafted. The rootstock then provides the root system of the new combined plant.

Rosette

Describes a cluster of leaves arranged in a tight circle, usually close to the soil surface, as seen on a dandelion. The term may also be used to describe the corolla of a flower.

Rots

General term for a number of diseases, which cause the death or decay of plant tissue.

Rotund

Having a rounded or spherical appearance.

Rufous

To be red/brown in colour.

Rugose

Refers to leaves that have a wrinkled or puckered appearance.

Runner

An offshoot of the parent plant that runs along the soil surface, which produces roots at the nodes.

Rust

A fungal disease that causes rust-coloured spots on leaves, stems and other parts of a plant.

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