Planting plans, stock sizes, and quantity takeoffs

Read the schedule before counting

A planting plan typically includes symbols, codes, botanical names, common names, quantities, stock sizes, spacing, and notes. A circle is a location symbol, not necessarily a scaled root ball or the final canopy diameter. Determine whether the drawing displays installation size, mature spread, or a graphic convention. Use the legend and schedule rather than infer meaning from a familiar symbol on another designer's plan.

Match each code to a complete specification. “ACPA” might mean a maple on one plan and something else on another. Botanical names resolve ambiguity, while cultivar names can distinguish dramatically different size, color, and growth habit. Container volume, tree caliper, height, branching, and root-stock type describe different attributes. A five-gallon shrub and a two-inch-caliper tree cannot be priced from the same size column without reading its heading.

Review drawing notes and details with the schedule. They can establish nursery quality, prohibited substitutions, planting depth, staking, mulch, watering, and guarantee requirements. The contract may also establish who removes unsuitable soil or maintains plants until acceptance. Count from the latest revision, and identify whether a schedule quantity or drawn count governs when they disagree. Resolve a discrepancy rather than silently choose the smaller order.

Quantities and spacing

Count individual trees and shrubs directly when each location is shown. For a massed groundcover bed, use the stated spacing geometry and the effective planted area. Square spacing allocates roughly spacing squared to each plant; equilateral triangular spacing allocates about 0.866 times spacing squared. The latter supports more plants per unit area at the same center-to-center distance.

For a 600-square-foot bed at two-foot square spacing, the simple estimate is 600 divided by four, or 150 plants. At two-foot triangular spacing, the estimate is 600 divided by 3.464, about 173.2, requiring a whole-number ordering decision. These are interior-area approximations. Actual edge offsets, irregular geometry, access openings, and obstacles affect the layout, so do not claim the formula gives an exact field count for every bed.

Convert inches to feet first. Eighteen inches is 1.5 feet, so square spacing uses 2.25 square feet per plant. Dividing area by eighteen squared would mix units and produce a wildly incorrect quantity. Add a documented allowance for the particular handling and replacement risks rather than automatically add ten percent to all plants. A specified contract quantity and a purchasing allowance should remain separately visible.

Stock, access, and planting labor

Labor depends on stock type and handling. Container stock may need circling-root correction; balled-and-burlapped trees need equipment and careful package removal; bare-root stock needs protection from desiccation. Estimate unloading, movement to the bed, excavation, unsuitable-soil handling, backfill, watering, staking when needed, and cleanup. A tree's purchase price alone does not represent its installed cost.

Check gate width, overhead lines, slopes, pavement load limits, and protected roots before selecting machinery. If a root ball cannot pass through the available gate, the contractor needs a different access plan, stock choice, or handling method before delivery. Lifting by the trunk can damage the tree even when the crown looks intact. Include protection for lawns and paving used as access routes.

Verify plants on delivery: identity, quantity, size, root-ball condition, pests, damage, moisture, and agreement with the accepted specification. Record rejected stock and approved substitutions. Do not count a dead plant in the delivered quantity as if it satisfied the contract. Protect staged plants from wind, heat, freezing, and inadequate watering while other trades finish.

Coordinate the installation

Planting locations must fit grading, drainage, underground utilities, paving, lighting, and irrigation. A tree placed over a drain cleanout can block maintenance; a mature canopy can obstruct a light; a planting pit can damage a recently installed lateral. Locate and stake major plants after the required site investigations and before excavation. Confirm sightlines, setbacks, and owner-approved adjustments.

Finish with a reconciled record of specified, delivered, installed, substituted, and remaining quantities. A measured takeoff supports procurement, but field verification and closeout establish what actually exists. Update the irrigation and maintenance instructions when the accepted planting changes: replacing a drought-adapted shrub with a moisture-loving one can alter zone needs. This links estimating and plan reading to plant culture rather than treating them as separate paperwork tasks.

Field application

A triangular-spaced bed with an access hatch needs its unobstructed planting area reduced before estimating stock. If a 600-square-foot outline contains a 36-square-foot access opening, use 564 square feet for the interior approximation, then resolve edge rows in the field layout. Ordering from the gross outline would place plants over required access or leave unexplained excess material. Mark the opening on both planting and irrigation plans so the crew does not restore the apparent gap during installation.

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