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The fertilised and matured ovule of a plant. It contains the embryo of a new plant, as well as nutrients for its development.

A shoot arising from the base of a plant, usually from the root stock, which produces a new plant.

A plant that will tolerate cooler temperatures. Half-hardy plants may be grown outdoors in summer, but won't survive frosts. Half-hardy shrubs and herbaceous plants may survive an average winter in sheltered or warm environments.

A fungal plant disease that causes a powdery coating on the surfaces of affected plants. Commonly occurs where plants have been exposed to damp conditions. It can be prevented by having good ventilation.

A group of plants sharing distinctive features, but not sufficiently distinct to be classed as a species. The words 'cultivated variety' have been compounded to provide the term cultivar, which refers to plants having a cultivated origin, while

1) An alternative term for the flower of a plant.2) Refers to the powder-like coating produced on the leaves, stems, flowers or fruit of certain plants.

A fast-growing crop grown simultaneously with, or between, successive plantings of a main crop. This efficient use of growing space is known as succession planting.

A group of genetically identical genes, cells or individual plants derived from a single parent plant by non-sexual means.

Refers to plants grown and marketed in containers ranging in size from one to five gallons. May be planted all year round.

Refers to roots that shrink vertically, drawing the plant down into the soil, especially in time of drought. They help position the plant at an appropriate level in the ground.