Gardening Glossary
Definitions for gardening terms that start withT
- tannin
An astringent substance that is found in some plants. Most commonly associated with wine grapes.
- tap root
The main root of a plant around which all the other roots will grow. They are typically the longest root on the plant.
- tender
A plant that is susceptible to cold weather and will die if the temperatures drop below freezing.
- tendril
A pseudo stem that grows on climbing plants and allows them to attach themselves to the objects that they climb.
- tetraploid
This is a plant that has four sets of chromosomes. This genetic anomaly often results in plants that are larger or are mutated in some way.
- thinning
The act of removing seedlings that are growing too close to their neighboring seedlings in order to ensure that the remaining plants can grow without competition.
- tiller
A shoot or stalk that grows from the crown (base) of the plant. Normally is used in refrence to grass.
OR
An implement used to till or turn the soil in a garden bed.
- topiary
The art of pruning a plant into a pre-designed shape.
- topsoil
The top layer of soil that normally contains the most organic material and nutrients.
- transpiration
The release of water vapor from the leaves of plants.
- transplant
Moving a plant from one location to another.
- tree sap
The liquid found inside a tree that circulates nutrients and water. The tree sap flows through the phloem layer of the tree in the xylem cells.
- true leaves
The real leaves that develop on the plant as it is growing. The first true leaves are typically the second pair of leaves that develop on a seedling.
- tuber
A specialized underground stem where a plant stores extra energy in the form of starch.
- tuberous root
A specialized, swollen root that the plant uses to store additional energy.

