Gardening Glossary: H-L

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H

Half Hardy: A plant that cannot withstand the coldest conditions in a particular climatic zone so needs some protection.

Hardening Off: The process of acclimatising plants grown under protection, in the greenhouse for example, to cooler conditions outdoors.

Hardwood Cutting: A cutting taken from mature wood.

Hardy: A plant that can withstand the extremes of climatic conditions in the area it is grown.

Heel: A small piece of bark at the bottom of a cutting when it is removed from the main stem. This often makes rooting the cutting easier.

Heeling In: Putting a plant in a temporary position until it can be permanently planted.

Herb: A plant grown for flavoring food or for medicinal purposes.

Herbaceous: Usually refers to perennials, these are plants with non-woody stems that die back to the roots at the end of the growing season.

Herbicide: A chemical used to kill weeds.

Honeydew: The sticky secretion from aphids, etc.

Humus: The beneficial decayed vegetable matter that helps to form soil.

Hybrid:– The offspring of two different plants.

Hydroponics: Growing plants in nutrient enriched water.

I

Indehiscent: A fruit that remains closed so doesn’t open to release seeds.

Inflorescence: A group of flowers growing on one stem.

Inorganic: Usually refers to fertilizers – those that do not derive from living material.

Insecticide: A substance, either chemical or organic, used to kills insects.

Internodal Cutting: A cutting taken by cutting between two nodes.

J

John Innes Compost: A loam based compost.

K

Knocking Out: Removing a plant from a pot to repot or check root ball.

L

Layering: A method of propagation used to make a new plant before severing it from the old plant.

Leaching: Losing nutrients from top soil by water draining them out.

Leaf Bud Cutting: A cutting taken from a small piece of stem with one or two leaves or buds.

Leaf Cutting: A cutting taken from a whole or part of a leaf.

Leaf Mold: Decomposed leaves used for compost and to add body to garden soil.

Leaflet: A sub-division of a compound leaf.

Leggy: Weak, tall growth on a plant, sometimes caused by keeping a plant in too warm conditions too long.

Legume: Dehiscent fruit that splits into two when mature.

Lithophyte: A plant that grows naturally on rocky ground.

Loam: Good soil, usually easy to work, with equal proportions of silt, sand, and clay and with a high proportion of humus.

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