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TERMS  &  DEFINITIONS

- A -

Acidic soil - Soil with a pH value of less than 7.0.

Acre - A unit of area in the U.S. customary system, used in land measurement and equal to 4,840 square yards, or 43,560 square feet.

Alkaline soil - Soil with a pH value of more than 7.0.

Annual - A flowering plant that lasts only one season.

Arbor - A shady garden shelter or bower, often made of rustic wood or latticework on which vines, roses, etc. are grown.

- B -

Ball & burlap - The wrapping of the root ball of a field-grown tree or shrub in a single piece of burlap usually held together with twine. The organic nature of burlap allows it to be left in the hole when planted.

BALUSTRADE - A complete railing system consisting of a top handrail supported on balusters (which sometimes rest on a bottom rail).

Bark - The surface layer of the trunk and branches of woody plants.

Biennial - A plant that grows one year, produces flowers, fruits, and seeds the next year, and then dies.

Bulb - A fleshy underground plant structure that contains the nutrients, energy, and seed to produce a plant. Bulbs are typically buried in the ground at least one season before they emerge. Daffodils, lilies, and tulips are common examples of bulbs.

- C -

CLASS 2 PERMEABLE BASE - Consists of 70% 3/4" gravel, 20% plaster sand, and 10% pea gravel.

Conifer - Cone bearing tree of the pine family, usually evergreen.

COURSE - A horizontal range of stone units (bricks or blocks) running the length of a wall.

- D -

Deadheading - The removal of spent flowers to tidy up a plant and force it to put its energy into producing more flowers.

Deciduous - Shedding or losing foliage at the end of the growing season.

Detention pond - A lined or unlined hole in which surface drainage is captured, held temporarily, and then released steadily.

Dieback - The death of tips of shoots caused by damage or disease.

Drainage - The movement of water across a piece of property. Drainage is divided into two basic types: surface drainage, which is visible and above the ground or on top of surfaces such as a roof, patio, or drive; and subsurface drainage, which occurs below ground.

Drain field - The configuration of surface swales and subsurface drain lines necessary to adequately gather and direct all the drainage on a piece of property.

Drip irrigation - An irrigation system that uses low volumes of low-pressure water emitted drip by drip at the base of a plant. This is the most economical and efficient way to water.

- E -

Easement - The right-of-way claimed by a municipality or utility, usually described as a number of feet from the edge of a road or property line within which the owner of the easement has certain rights and limitations.

Edging - A crisp edge between areas of the garden. Most typically used between a lawn and a flowerbed.

Evergreen - Persisting and remains green throughout the year.

- F -

- G -

Ground cover - Plants that are used to cover bare ground; they usually spread to form dense colonies that coke out weeds.

- H -

- I -

IPM (Integrated pest management) - IPM is a decision making process using accumulated plant and pest knowledge to detect, monitor and predict out breaks.

- J -

- K -

- L -

Landscape fabric - A synthetic material that allows water to pass through but block light, soil, and weed roots from penetrating.

Low-voltage light - A light fixture (or system of fixtures) that operates on 12-volts instead of the standard 120-volt household current. Low-voltage systems use less wattage yet provide comparable performance to many 120-volt, higher wattage light bulbs.

- M -

Mulch - A layer of organic or inorganic material placed around plants to hold in moisture and reduce weeds.

Multi-stemmed - A tree or shrub with several main stems arising from the ground.

- N -

Nitrogen - One of three essential nutrients (phosphorus and potassium are the others) for healthy plants. Nitrogen fuels vegetative growth. On fertilizer packages, it is the N in N-P-K.

- O -

- P -

PARQUETRY - A flat inlay of stone floors in closely fitted geometrical or other patterns, often including two or more colors or materials.

Peat moss - A usually weed-free form of organic matter created by the partial decomposition of sphagnum moss. It increases soil acidity and retains moisture.

Perennial - A flowering plant that comes back every year.

Pergola - A free standing structure with a roof or lath canopy designed to cast shade.

pH - The reciprocal of the hydrogen ion concentration of a medium. A value on a scale of 0 to 14 gives a measure of the acidity or alkalinity of a medium; pH values of 0 to 6.5 indicate acidic conditions, a pH value of 7.0 is neutral and pH values of greater than 7.0 are alkaline.

Phosphorus - One of the three essential nutrients plants require. Phosphorus promotes fruiting and flowering. On fertilizer packages, it is the P in N-P-K.

Photosynthesis - The production of organic compounds required for growth in plants by a complex process involving chlorophyll, light energy, carbon dioxide and water.

Pinching - Snipping out (or using fingernails to literally pinch out) the growing point of a plant to promote fuller, bushier plants.

Pollen - The fine, powder-like material produced by the anthers of flowering plants, and functioning as the male element in fertilization.

Potassium - One of three essential nutrients required for plant growth. Potassium promotes root growth and disease resistance. Also know as potash. On fertilizer packages, it is the K in N-P-K.

Propagate - To create new plants.

Pruning - Removing growth from a plant or tree to maintain its health, regulate its shape and control flowering.

- Q -

- R -

Raised bed - A bed that is higher than the surrounding area, often contained within a low retaining wall.

Renewal pruning - A system in which older wood is regularly removed in favor of younger growth.

Retaining wall - A structure made of masonry, stone or wood used to hold back soil, usually for the purpose of creating a level area in front or behind the wall.

Retention pond - A hole dug to capture and hold surface drainage.

REVETMENT WALL - A wall made of concrete, stone, wood, or other materials which is built against a stream bank or a steep slope to prevent erosion.

Rise - The term used to describe the height of an individual step in a set of stairs.

Root pruning - The removal of part of the root system of a tree to restrict growth and in fruit trees induce fruiting.

Run - The term used to describe the length from the front edge of a step to the back edge of a step in a set of stairs.

RIPRAP - Irregular broken and randomly sized pieces of rock used for facing bridge abutments and fills; stone thrown together without order to form a foundation, breakwater or sustaining wall.

- S -

Slope - The difference in height between two points, usually given in a ratio such as 1:4, which means the ground drops 1 vertical foot for every 4 feet of horizontal distance.

Soil - Soil is a living breathing complex mixture of minerals, organic matter and living organisms. It provides support for plant roots, and is a source of water and nutrients essential for plant growth.

Soil compaction - Compaction from foot traffic, construction or other activities crushes small roots and makes soil impervious to invasion by new roots.

Soil structure - The physical texture and content of the soil independent of nutrition. Structure impacts the way a soil drains and holds onto moisture.

Soil test - A simple process by which the basic nutrients, elements and pH of a soil can be determined.

Specimen plant - An individual tree or shrub that is selected, tended and placed to be viewed as a sculptural form.

Sucker - A shoot that arises at or below ground level from a plant's root or underground stem.

- T -

Thinning out - The selective cutting away of individual branches to create open spaces within the plant, remove dead limbs or branches, produce symmetry and train a plant to look more natural. It also aids in better fruit production.

- U -

- V -

Variegated leaves - Leaves that are patterned in a different color.

VENEER STONE - Any stone used as a decorative facing material which is not meant to be load bearing.

- W -

- X -

- Y -

- Z -
 


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