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| Word | Description |
| Habitat |
The location in which the plants grow, usually referring to the type of conditions it grows in in the wild. |
| Haft |
The narrow basal portion of the falls of an iris. |
| Hardiness |
The hardiness of a plant reflects the 60-year average minimum winter temperature of a region which it can survive at best. The United States Department of Agriculture (USDA) in cooperation with the National Weather Service (NWS) has identified various reg |
| Hardiness zone |
Refers to the state of the climate in a specific region. It gives an indication of the average of minimum temperatures reached over the year. See map. |
| Harmony |
Color harmonies are the result of combining closely related colors, such as those that are next to each other on the color wheel. Single-color harmonies are harmonies of tints and shades of the same color; multi-color harmonies are based on different colo |
| Herbaceous |
Not woody, dying back to the ground every year. |
| Hue |
The name of any color as found in its pure state in the spectrum or rainbow, or that aspect of any color. May refer to a particular wavelength. pigment colors combine differently than colors of light. The primary colors (in pigment: red, yellow, and blue; |
| Hybrid |
A plant resulting in a cross between two unlike parents. |
| Hybridization |
Crossbreeding two species to create a plant with some characterisitics of each parent. |