GALL: An unusual and abnormal growth on a plant. Caused by insects, but can also be caused by bacteria and fungi. No harm to the plant material other than it is unsightly.

GARDEN DESIGNER: A professional that will create garden or landscape plans for residential or commercial space.

GENUS: groups of closely related species clearly defined from other plants.

GEOTROPISM: Not a commonly used term but it is the response to gravity. Plant parts that grow downward, such as the roots, would be positive geotropism. A negative geotropism would be the stems growing upward.

GERMINATE: The sprouting of a seed.

GERMINATION: The first stage in the development of a plant from seed. The breaking of dormancy in seeds or the sprouting of pollen grains deposited on a stigma.

GIBBERELLIN: A hormone used in plant production. Often used in Camellia blooms and in increasing the size of fruits.

GIRDLING: removing the bark from a woody stem to kill the plant. Encircling a stem with a material so that the cambium layer is destroyed, killing the plant.

GLADE: An open space in a woodland area.

GLABROUS: Plant surface which is smooth and hairless.

GLASSHOUSE: our friends the British use this in reference to a greenhouse.

GLAUCOUS: Plant surface which is covered with a bluish-gray bloom.

GLEN: A term meaning a narrow valley.

GLOCHID: A small hooked hair borne on some cacti.

GRADE: The degree or direction of a slope. Mainly associated with house construction and landscaping.

GRAFT: Process whereby a part taken from one plant is made to unite with and grown upon another part of a plant.

GRAFTING: The uniting of a short length of stem of one plant onto the root stock of a different plant. This is often done to produce a hardier or more disease resistant plant. Also, it is the process of joining a stem or bud of one plant on to the stem of another.

GRANULAR FERTILIZER: A fertilizer that is dry and is a tiny pellet form. It is spreadable and should be measured. A granular fertilizer can come in both a natural and synthetic form.

GREENHOUSE: A structure that can be build out of glass, plastic, or fiberglass. Greenhouses are used for cultivation and protection of plants.

GREEN MANURE: An annual cover crop that is turned into the soil. Generally these crops return more nutrients to the soil than they require to grow.

GREENSAND: An organic source of potassium. About 7% potash plus 32 trace elements.

GROUND COVER: A group of plants usually used to cover bare earth and create a uniform appearance.

GROWING HABIT: A direction or shape a plant takes as it grows.

GROWING POINT: The tip of a stem, which is responsible for extension growth.

GROWING SEASON: The number of days between the average date of the last killing frost in spring and the first killing frost in fall.