Glossary

This Glossary is a list of terms and words relating to plants. Read information and see  pictures about plant pests, diseases, propagation methods, clean air plants, poisonous houseplants, bonsai techniques, and helpful plant products. You can explore the Glossary as a list, or link to these terms from various plant detail pages. See Entire Glossary
Showing Terms 11 to 20 of 54 total
If you don't want to use a commercial chemical product to treat plant pest problems try the “Green Solution.” This is a mixture of water, alcohol, biodegradable liquid soap, and mineral oil. Always test any spray on one or two... Read More
This is an artificial light source that helps plants grow when there is not enough natural light. These lights attempt to provide a spectrum of light similar to what the sun provides. Orchids & African Violets can be encourage... Read More
A hardiness zone is a geographically defined area in which certain types of plants can grow as defined by climatic conditions, including their ability to withstand the minimum temperatures of the zone. The hardiness zones are help... Read More
Herb Gardens are becoming more popular as people realize how many uses there are for these small treasures. There are annual herbs for cooking such as: basil, dill, & savory and perennial herbs such as mint, rosemary, thyme, &... Read More
A bulb is that part of a plant that contains the tender shoots of a new plant. Many flowering plants such as tulips, hyacinths, and lilies are propagated by bulbs. The energy a new plant needs to develop is stored in the bulbs. Th... Read More
Humidity refers to the amount of water vapor in the air and is not easily controlled. The good news is that although many houseplants prefer high humidity (50-70%), most manage to do quite well in the 20-60% humidity found in our ... Read More
Hydroponics is a type of hydroculture and is a way to grow various types of plants in water, without any soil, and with the addition of mineral nutrient solutions. All kinds of plants may be grown with their roots in the mineral n... Read More
Red Amaryllis and green leaf Ikebana arrangement
Ikebana, the Japanese art of flower arrangement, literally means "the arrangement of living materials in water." *Flower arrangement picture thanks to the Ikebana of Arizona annual exhibition at the Phoenix Art Museum.... Read More
Insecticidal Soap is defined as any of the potassium fatty acid soaps used to control many plant pests and diseases. This product is typically sprayed on plants in the same manner as other insecticides. It works only on direct con... Read More
Brown and yellow circles on plant leaf
When a plant gets Leaf Spot Disease, the attacking fungus or bacteria leaves small brown spots trimmed in yellow where it is feeding on the leaves. These spots may vary in shape, color, and size.  As with all other fungal and bac... Read More
Showing Terms 11 to 20 of 54 total