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-- T --

TAP ROOT -- A strong root, sometimes swollen, which grows vertically into the soil or compost.

TENDER -- An indoor plant which requires a minimum temperature of 60"F. Occasional short exposure to temperatures below this level may be tolerated. Compare hardy and half hardy.

TENDRIL -- A thread-like stem or leaf which clings to any nearby support.

TERMINAL -- The uppermost bud or flower on a stem.

TERRARIUM -- A partly or entirely closed glass container used to house a collection of indoor plants.

TERRESTRIAL -- A plant which grows in the soil.

TOPIARY -- The art of clipping and training woody plants to form geometric shapes or intricate patterns. Box and Myrtle are suitable types.

TOPDRESS -- A process that means to apply on the surface of soil. Usually referring to the spreading of organic material such as ground bark or manure.

TRANSPIRATION -- The loss of water through the pores of the leaf.

TREE -- A woody plant with a distinct central trunk. Compare shrub.

TUBER -- A storage organ used for propagation. It may be a fleshy root (e.g Dahlia) or a swollen underground stem.

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-- U --

UMBEL -- A part of the plant bearing flowers in which all the flower stalks are of similar length and arise from the same point.

UNISEXUAL -- A flower of one sex only (See also Monoecious and Dioecious)

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-- V --

VARIEGATED LEAF -- A green leaf design which is blotched, edged or spotted with yellow, white or cream colour.

VARIETY -- One of possibly many closely-related plant species. The variety name is usually in Latin.

VERMICULITE -- This is a mineral called mica that is heated and puffed up to form lightweight, sponge-like granules capable of holding both water and air.

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-- W --

WEED -- An uninvited and usually unattractive plant that surfaces in gardens. Usually seeds are delivered by winds, but not always.

WHORLED -- Leaf form, where three or more leaves radiate from a single node.

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-- X --

XERISCAPE -- A patented name that stands for water-conserving landscapes.

XEROPHYTE -- A plant which is able to live under very dry conditions.

XYLEM -- The tissue responsible for the upward movement of water and nutrients from the roots of a plant to its leaves.

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-- Y --
Y - Currently no gardening terms under this section
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-- Z --

ZINC -- Zinc is a mineral which aids in cell division, as well as enzyme and auxin productions and utilization. Small, thin, yellow leaves as well as low yields are symptoms of zinc deficiencies.

ZONE -- An area defined by its range of temperatures and used to describe the hardiness of plants.

ZONING -- A ring of contrasting color on a leaf.

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