Gardening Glossary
Definitions for gardening terms that start withD
- damping down
A method where the area, normally a greenhouse, is sprayed down with water in order to increase humidity and lower the air temperature.
- damping off
When plants, normally seedlings, rot due to over watering or improper watering practices.
- deadhead
Pinching off used or dead blooms to prevent them from setting seed and encourage further blooming.
- deciduous
A plant that loses and regrows its leaves naturally during the course of the year.
- desiccation
Damage to a plant or tree caused by dehydrating of leaves. This frequently happens most often on evergreen plants during the winter where cold winds virtually freeze dry the leaves.
- determinate
A plant that only produces blossom on active growth branches and stop growing when the plant had set fruit.
- dethatch
Removing dead grass and debris that builds up beneath lawn grasses.
- dibble stick
A pointed tool for making holes in the ground for planting seeds, bulbs, or young plants.
- dioecious
Plants that have male and female systems on different plants. For these plants, you will need both a male and female plant to produce fruit and seeds.
- diploid
A plant that has a normal number of chromosomes, one from the male and one from the female parent.
- disbudding
Removing extra flower buds on a plant to support the health and growth of other flower buds on the plant.
- disease
An external force that causes a plant to lose vigor and health. Typically caused by bacteria or a virus.
- dividing
Splitting a parent plant into two or more smaller plants for propagation purposes.
- division
A section of a larger plant that has been separated in order to create a genetic copy of the parent. This is a common propagation method.
- dormancy
A period where a plant stops all growth and reproduction. Frequently, the plant will lose leaves and look dead, when in fact it is simply “sleeping”.
- double digging
A method of tilling where the soil in one row is turned and then moved to a second row. Typically during this process, organic material is added.
- double flower
A flower that has mutated to have extra petals. This type of flowering usually results in a flower that looks fuller and rounder.
- dried blood
A fertilizer supplement that is made by drying and powdering blood. It is used to add nitrogen to soil and is consider acceptable for organic gardening.
- drip line
A type of irrigation that delivers water directly to the roots of plants through the use of small tubes that “drip” the water out to the base of the plant.
- drupes
A type of fruit that has a fleshy outside and an hard inner shell or stone. Many drupes are eaten. Some examples include almonds, blackberries and cherries.

