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Gardeners' glossary A-Z

Dd

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.

Damping down

Refers to the practice of spraying the floor of a greenhouse or polytunnel on hot mornings to increase humidity.

Damping off

The term used for fungal ailments, usually affecting seedlings, that cause the stem to rot off at soil level.

Deadheading

The practice of removing dead flowerheads in order to encourage more blooms.

Deciduous

Describes plants, principally trees and shrubs, that shed their leaves seasonally.

Decumbent

Reclining, or laying on the ground, but with tip ascending.

Decurrent

A term that refers to leaves whose base extends down the stem below the insertion.

Dehiscent/dehiscence

The opening of an anther, fruit or sporangium at maturity to release its contents (pollen, seeds or spores).

Deltoid

A triangular leaf, attached to the stem or leaf stalk (petiole) on one side, rather than at a point. See Cuneate.

Dentate

Referring to leaves whose edges are toothed.

Denticulate

Minutely dentate.

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