Taproot : The large primary root that grows vertically downward, giving off small lateral roots.

Toxin : A poisonous substance produced by a living organism.

Tuber : An enlarged, fleshy, underground stem with buds capable of producing new plants.

Vector : An organism able to transport and transmit a pathogen to a host.

Vegetative : Plant parts or plant growth not involved in the production of seed, such as roots, stems, and leaves.

Vermicompost : Or worm compost is produced by feeding kitchen scraps and shredded newspaper to worms. It is one of several different methods of composting.

Vermiculite : A spongy soil conditioner often used to lighten clay soils. It may also be used as a propagating conditioner.

Vermiculture : Using worms to eat newspapers and food scrapes to produce nutrient rich castings.

Volunteer : Is a plant that grows on its own, rather than being deliberately planted by a human farmer or gardener.

Weed Control : A botanical component of pest control, stops weeds from reaching a mature stage of growth when they could be harmful to domesticated plants, sometimes livestocks, by using manual techniques including soil cultivation, mulching and herbicides.

Weeds : A plant growing in a place where it is not desirable. Any plant can be a weed to different people.

White Roots : Secondary roots.

Wildlife Gardening : Is a school of gardening that is aimed at creating an environment that is attractive to various forms of wildlife such as birds, amphibians, reptiles, insects, mammals and so on.

Wood Ashes : NPK 0-1.5-8. Will increase the pH of soil. It should not be used in one area more than every 3-4 years.

Xeriscaping : Is a water-conservative approach to landscaping. Plants whose cultural requirements are appropriate to the local climate are emphasized, and care is taken to avoid wasting water to evaporation and run-off.