- Quartered
- Having the petals arranged in three, four, or five radial segments.
- Quartz
- Quartz can be used as a landscape mulch. Quartz comes in various colors
and will not alter the soil's pH. - Quick Lime
- Quick lime is Calcium Oxide (CaO) and should be used with extreme care on soil. It will react quickly with water to form a calcium hydrate. However, if sufficient water isn't available, quick lime pulls water from plants, bacteria, fungi and other living organisms, which can lead to plant death. Quick lime will also react with manures and nitrogen fertilizers, releasing the nitrogen as a gas before it can be absorbed by the roots.
- Quincunx
- The arrangement of five objects, such as trees, with one on each of four corners and one in the center.
