- Ecology
- The relationship of plants to each other and their environment.
- Edging
- A line that creates visual interest and separation, for example, between the lawn and an annual border.
- Edging plants
- Dwarf, compact plants that are used for the front of a border, or for planting along paths or steps.
- Embryo
- The dormant, immature plant within each seed.
- Endosperm
- The food storage tissue within a seed
- Epiphyte
- A plant which grows above ground, attaching itself to a tree or rock.
- Evergreen
- Retaining leaves for most or all of an annual cycle.
- Everlasting
- A plant whose flowers retain some of their color and can be prepared for dried arrangements.
- Evapotranspiration
- Abbreviated as ET, it is the amount of water that transpires through a plants leaves combined with the amount that evaporates from the soil in which it is growing. Used as a guide for how much water a plant needs per day/week/year.
- Eye
- A bud. With perennials, it usually refers to a dormant bud growing on the root. Also the center of a flower.
- Exotic
- Strictly speaking, a plant which is not native to the area, but popularly any unusual or striking plant.
