Before You Plant Anything: An Outdoor Space Assessment Checklist

Sun exposure, soil drainage, frost dates, and water access all shape what will grow well. Use this checklist to evaluate your yard before buying a single plant.

Why a Pre-Plant Assessment Matters

Most struggling gardens share one root cause: plants chosen before the yard was truly understood. A rose that needs full sun planted in afternoon shade, a vegetable bed placed in a low spot that pools water after every rain, a hedge that outgrows its space in two seasons — these are avoidable outcomes.

This checklist walks you through the key site factors that determine what will grow well in your outdoor space. Work through it once before you spend a dollar at the garden center, and you'll make every purchase with far more confidence. Bring a notebook, a simple compass app on your phone, and about an hour on a clear day.

Required

Compass app (smartphone)

Determines cardinal directions so you can accurately assess which way planting areas face and anticipate sun patterns.

Required

Notepad or garden journal

Records sunlight hours, drainage observations, measurements, and other site data you'll refer back to when selecting plants.

Required

Tape measure

Provides accurate bed dimensions so you can match plant mature sizes to available space.

Required

Soil test kit or extension service mailer

Reveals pH, nutrient levels, and organic matter content so you can amend soil appropriately before planting.

Required

Screwdriver or soil probe

A quick way to test soil compaction — if a standard screwdriver won't push 6 inches in easily, the soil needs attention.

Optional

Camera or phone photos

Documents existing conditions, sun positions, drainage behavior, and layout for easy reference while planning.

The Assessment Checklist

Work through each group below in the order listed. Some items require you to return at different times of day or after a rain event — note those and follow up before making final planting decisions.

Sunlight Assessment

Track sun exposure in the planting area at three points during the day — morning (9 a.m.), midday (12 p.m.), and late afternoon (4 p.m.) — and log how many total hours of direct sun each spot receives. Must

Note which structures, fences, or trees cast shadows and at what times, since shade sources shift significantly from spring through summer. Must

Categorize each planting zone as full sun (6+ hours), part sun/shade (3–6 hours), or full shade (fewer than 3 hours) to guide plant selection. Must

Soil Drainage and Quality

Dig a hole approximately 12 inches deep and 12 inches wide, fill it with water, and observe how long it takes to drain completely — more than four hours signals poor drainage that may require amendment. Must

Check soil texture by squeezing a handful: sandy soil falls apart, clay soil holds its shape, and loam (the ideal) forms a loose ball that crumbles with a tap. Must

Collect a soil sample from each distinct planting area and have it tested through your local cooperative extension office to get pH and nutrient readings before adding any amendments. Should

Look for signs of compaction — soil that repels water or feels rock-hard when you press a screwdriver in — as compacted areas will need aeration or raised-bed solutions. Should

Water and Irrigation Access

Identify all outdoor water sources (hose bibs, irrigation zones, rain barrels) and measure the distance from each to your planned planting areas to assess reach and convenience. Must

Observe how water moves across your yard after a moderate rain — note any areas that puddle, channel, or dry out quickly. Must

Determine whether any planting areas sit in a natural low point that collects runoff, which may require drainage improvements or a shift to moisture-tolerant plants. Should

Note areas under roof overhangs or dense tree canopies that receive little to no rainfall, since they will require supplemental watering regardless of weather. Should

Climate and Frost Dates

Identify your USDA Plant Hardiness Zone using the official USDA zone map, which determines the cold-tolerance range for perennials and shrubs you can plant. Must

Look up your area's average last spring frost date and first fall frost date — these define your growing season window for warm-season crops and tender plants. Must

Identify any microclimates in your yard, such as south-facing walls that retain heat or low-lying areas that collect cold air overnight, as these affect what thrives in specific spots. Should

Space and Scale

Measure the actual dimensions of each planting area and record them, so you can match plant mature sizes to available space rather than relying on visual guesswork. Must

Note the proximity of planting areas to foundations, utility lines, and paved surfaces, since roots and canopy spread can create long-term problems if overlooked at planting time. Must

Account for foot traffic patterns — areas where people or pets regularly walk will need hardscape or extremely durable ground covers rather than delicate plantings. Should

Existing Vegetation and Site Hazards

Identify and map any existing trees, shrubs, or perennials that will remain, noting their root spread and canopy size, as these compete with new plantings for water and nutrients. Must

Check for invasive plants, persistent weeds, or signs of soil-borne disease that should be addressed before new plants go in. Must

Call 811 (the national U.S. dig-safe hotline) before any digging deeper than 12 inches to have underground utility lines marked at no cost. Must

Note evidence of deer, rabbits, or other wildlife pressure — visible browse damage or droppings — so you can select plants with appropriate resistance or plan protective barriers. Nice to have

Don't Skip the Utility Line Check

Before digging any planting hole deeper than 12 inches — including for trees, shrubs, or raised bed frames — call 811 to request a free utility line marking. Striking a buried gas, electric, or water line is a serious safety hazard and can result in costly repairs. This service is free, required by law before excavation in most U.S. states, and typically completed within a few business days of your request.

Avoid Amending Soil Without a Test First

Adding lime, sulfur, or fertilizers without knowing your soil's current pH and nutrient levels can make conditions worse, not better. Over-liming, for example, can lock out nutrients even when they're present in the soil. A simple soil test — available inexpensively through most county extension offices — removes the guesswork and tells you exactly what, if anything, needs to be adjusted.

Putting Your Findings to Work

Once you've completed the checklist, you'll have a clear picture of what each area of your yard can realistically support. Group your notes by zone — sunny and dry, shady and moist, high-traffic, etc. — and use those profiles when selecting plants rather than choosing plants first and hoping for the best.

If your soil drainage is poor, raised beds or amended planting areas are practical solutions worth exploring before you plant. If certain areas receive fewer than four hours of direct sun, steer toward shade-tolerant species and ground covers rather than fighting conditions that won't change.

Work With Your Site, Not Against It

No yard assessment will reveal perfect conditions, and that's completely normal. The goal is not to find an ideal site but to understand the site you have. Every challenge — heavy clay, deep shade, steep slope — has plant and design solutions. Trying to force plants into mismatched conditions through repeated soil amendments or supplemental lighting is rarely sustainable and often disappointing. Selecting plants suited to actual conditions, even modest ones, consistently outperforms the alternative.

Native plants adapted to your region's climate are often the most forgiving starting point, particularly if you're working with challenging soil or irregular rainfall. Your local cooperative extension service — a network of land-grant university offices found in most U.S. counties — can provide region-specific planting guides, frost date tables, and soil-testing resources at little or no cost.

Revisit this checklist each time you plan to expand or redesign a planting area. Conditions change as trees mature, structures are added, or drainage patterns shift. A yard that had full sun five years ago may now be partially shaded — and that changes everything.

Why a Pre-Plant Assessment Matters

The Assessment Checklist

Putting Your Findings to Work

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