The Ultimate Gardening Glossary

Gardening can seem like a complex topic, particularly for beginners - so we thought it would be a great idea to create the only gardening glossary of terms you will ever need!

Turf Definition


  • Acidic soil โ€“ Soils with a pH of below 7 (Also see pH).
  • Adventitious root โ€“ A root that arises from any organ other than primary or seminal roots.
  • Aeration, mechanical โ€“ within gardening, aerating is the process of providing more oxygen to a lawn. Aerating can also help provide additional nutrients deep within the soil & increase drainage. See cultivation.
  • Alkaline soil โ€“ Soils with a pH of above 7 (Also see pH).
  • Annual, summer โ€“ Plant that completes its life cycle from seed in one growing season over the summer.
  • Annual, winter โ€“ Plant that initiates growth during the autumn, lives over winter, and dies after producing seed the following season.
  • Apical meristem โ€“ Terminal growing point.
  • Auricle โ€“ Claw-like appendages occurring in pairs appearing at the base of the leaf blade.


  • Bench setting โ€“ The high at which the bottom blade of a mower is set above a firm level surface. This is an adjustable setting on many lawn mowers.
  • Blade โ€“ The flattened portion of the leaf located above the sheath.
  • Brush โ€“ To move a brush against the surface of a turf in order to lift non-vertical stolons and/or leaves before mowing, with the end goal of producing and upright stand of grass. Brushing in different directions can be used to create 'lines' within a lawn.
  • Bunch-type growth โ€“ Plant developing itself through tillering at or near the soil surface without the production of stolons or rhizomes.


  • Carbohydrate โ€“ The plants food source, a compound of carbon, hydrogen and oxygen, as in sugar, starch and cellulose.
  • Castings (Earthworm) โ€“ Soil and plant remains excreted by earthworms and deposited on the turf surface or in the burrow; forms a stable soil granule that can be objectionable on mown turf.
  • Clippings โ€“ Leaves and in some cases stems deposited on the turf surface after mowing.
  • Collar โ€“ Light-coloured band at the junction of the leaf blade and the leaf sheath.
  • Coring โ€“ A method of turf cultivation by which soil cores are removed using hollow tines.
  • Compaction โ€“ The compression of soil particles leading to unfavourable growing conditions for the turf grass plant.
  • Creeping growth habit โ€“ Plant development by an extravaginal stem growth at or near the soil surface with lateral spreading rhizomes and/or stolons.
  • Crown โ€“ A highly compressed stem located at the base of a vegetative aerial shoot.
  • Culm โ€“ Flower stem of the grass plant.
  • Cultivar โ€“ An assemblage of cultivated plants distinguished by any characters (morphological, physiological, and the like) that when reproduced sexually or asexually retain their distinguishing features..
  • Cultivation โ€“ Applied to turf, cultivation refers to the working of the soil and/or thatch without destruction of the turf grass surface; for example, coring spiking, or other means.


  • Evapotranspiration โ€“ The loss of water/moisture from the turf grass leaf and the soil surface to the atmosphere. This is more common on hot days.


  • Fertiliser - A solution or solid substance when applied to plants can encourage growth by supplying essential nutrients and increase fertility. Adding to much fertiliser can kill plants & turf, always read the label before application.


  • Germinate - The very first stage of a plants life, when a seed begins to sprout & develop shoots and is ready to be planted.


  • Irrigation, automatic โ€“ Hydraulic-electric control of water application in response to turf grass needs.
  • Irrigation, manual โ€“ Irrigation using hand set or hand valved equipment.


  • Lateral shoot โ€“ A shoot originating from a vegetative bud in the axil of the leaf or from the node of a stem, rhizome or stolon.
  • Layering, soil โ€“ Undesirable stratification within the surface horizons of a soil profile; can be due to construction design, top-dressing with different textured materials or inadequate mixing.
  • Leaching โ€“ Loss of nutrients (ionic form) through natural drainage of the soilโ€™s solution.
  • Ligule โ€“ Membranous or hairy appendage on the adaxial side of the grass leaf at the junction of the leaf blade and leaf sheath.
  • Liquid fertilisation โ€“ A method of applying fertiliser using liquid as the carrier. Applied as a liquid solution.


  • Mat โ€“ A tightly intermingled layer composing of living and partially decomposed stem and root material and soil that develops below the thatch layer but above the soils surface.
  • Micro organism โ€“ Minute living organisms such as bacteria or fungi.
  • Monocot โ€“ Plant having one cotyledon in the seed; grasses are an example.
  • Mowing frequency โ€“ The number of times a turf grass sward is mown per week, month or growing season.
  • Mowing height โ€“ The distance above the ground at which the leaf is cut by a mowers blade.
  • Mulch โ€“ Any non-living material that forms a covering on the turf grass or soil surface.


  • Nitrification โ€“ Formation of nitrates and nitrites from ammonia by soil micro organisms.
  • Node โ€“ The joint of a stem; the region of attachment of leaves to a stem.


  • pHlevelโ€“ per hydrogen or the negative logarithm of the hydrogen ion concentration of the soil.
  • Pollinate - when pollen is taken from one plant to another, for fertilisation purposes as to allow new plant seeds to be produced.


  • Root zone โ€“ A prepared mixture of minerals and organic matter used as a growth medium for turf grass.
  • Rhizome - a plant stem that grows horizontally.


  • Seminal root โ€“ The primary root.
  • Settling, soil โ€“ A lowering of the soil surface resulting in a decrease of volume to a soil previously loosened by some form of cultivation (bare soil). Occurs naturally but can be accelerated by mechanically tampering or heeling in the surface after cultivations have taken place.
  • Sheath โ€“ The tubular basal portion of the leaf enclosing and wrapping around the stem.
  • Slowly available fertiliser โ€“ Designates a rate of dissolution less than obtained for completely water soluble fertilisers; may involve compounds that dissolve slowly, materials that must be microbially decomposed, or soluble compounds coated with substances highly impermeable to water.
  • Soil modification โ€“ Alteration of soil characteristics by soil amendment; commonly used to improve physical conditions.
  • Soil probe โ€“ A cylindrical soil sampling tool with a cutting edge at the lower end.
  • Spiking โ€“ A method of turf cultivation in which solid tines or flat pointed blades penetrate the turf and soil surface.
  • Stand โ€“ A number of established individual turf grass genus and species Stolon โ€“ An elongated stem (or shoot) that grows along the surface of the ground and from which leaves and adventitious roots develop at the nodes.
  • Stomates (Stoma, Stomata) โ€“ Openings in the epidermis of leaves and stems that function in the exchange of gases between the atmosphere and the plant.
  • Sub-soil โ€“ The soil elevation established so that the top-soil placed on t will have the desired thickness and final grade or elevation.


  • Texture, leaf โ€“ Texture imparted to turf by leaf width and arrangement.
  • Texture, soil โ€“ The relative proportions of mineral matter found in soil.
  • Thatch โ€“ A layer of un-decomposed or partially decomposed organic residues situated above the soil surface but below the turf grass leaves. Consists of all parts of the turf grass plant.
  • Thatch control โ€“ The process of (a) preventing excessive thatch build up by accumulation by cultural manipulation and/or (b) removing excess thatch from a turf surface by either mechanical or biological means.
  • Tiller โ€“ A lateral shoot, usually erect that develops intravaginally from buds.
  • Top-dressing โ€“ A prepared soil mix added to the surface of a turf and worked in by brushing, raking and/or irrigating to produce a smooth surface. Firms turf by working soil in among stolons and thatch forming materials. Also enhances thatch decomposition.
  • Tufted โ€“ See bunch-type Turf โ€“ A covering of mown vegetation, usually turf grass, growing intimately with the an upper soil layer of intermingled roots and stems.
  • Turf - A species or cultivar of grass, usually of spreading habit, that can be maintained as a mown turf. Turf is usually sold in rolls of 1 metre squared and is known as sod in America.
  • Turf grass community โ€“ An aggregation of individual turf grass plants that have a mutual relationship with the environment as well a among individual plants.


  • Urea formaldehyde โ€“ A synthetic slowly soluble nitrogen fertiliser consisting mainly of methylene urea polymers of different lengths and solubilityโ€™s; formed by reacting urea and formaldehyde.


  • Variety โ€“ See cultivar.
  • Vertical mower โ€“ A mechanical devise with vertically rotating blades that cut into the face of the turf for the purpose of reducing thatch, and improving gaseous exchange.


  • Wear โ€“ The collective injurious effects of traffic (foot or mechanical) on the turf grass plant.
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