How to Create a Planting Guide: From Zone Map to Layout
Francis Karuri
Landscape & AI Correspondent
Most gardeners skip the planning stage entirely. They walk into a nursery, see something flowering, buy three of it, bring it home, and discover it needs full sun in a bed that gets two hours. The plant was beautiful in the pot and wrong in the border. A planting guide prevents that problem by matching every plant to a confirmed position, season, and growing condition before you spend a single pound or dollar.
This article walks through the five-step process for building a planting guide from scratch. It is a thinking framework, not a plant list. The goal is a document you can hand to a contractor, share with a nursery, or use as a personal shopping list that eliminates impulse purchases and wrong-zone failures.
If you already have a garden layout plan, this guide picks up where that process ends. If you do not yet have a layout, start with How to Plan a Garden Layout and return here when your zones and structure are decided.
Map Your Conditions
This is the filter step. Before you look at a single plant, record the conditions that determine what will thrive and what will struggle. This single step eliminates roughly 60 percent of wrong-plant-wrong-place decisions.
What to record
- USDA hardiness zone: enter your postcode at planthardiness.ars.usda.gov. This is the single most important filter — it eliminates every plant that will not survive your average minimum winter temperature
- Sun hours per area: observe each planting bed at three points during the day (morning, midday, late afternoon). Record as full sun (6+ hours), part shade (3–6 hours), or full shade (below 3 hours)
- Soil type: squeeze a handful of moist soil. If it holds shape and feels sticky, you have clay. If it crumbles immediately, sand. If it holds shape loosely and feels gritty-smooth, loam. Most plants prefer loam; clay and sand need specific plant selections or amendment
- Drainage: dig a hole 30cm deep, fill with water, and time how long it takes to drain. Under 4 hours is well-drained. Over 12 hours is poor drainage — you need plants that tolerate wet feet or you need to improve the soil structure
- Aspect: which direction does each border face? South-facing beds get the most sun (in the northern hemisphere). North-facing beds are cooler and shadier. East-facing beds get gentle morning light; west-facing beds get hot afternoon sun
Why this matters
Every condition you record becomes a filter. When you reach step 3 and start selecting plants, you will only consider species that match all five conditions for their intended position. No filter means no elimination means impulse buying with a plan that looks organised but performs no better than guesswork.
For a detailed breakdown of zone-specific plant selections, see our USDA Zone Plant Guide.
Choose Structure Plants First
Structure plants are the bones of the garden. They define scale, create screening, provide year-round form, and determine how much light and space remains for everything else. They go in first because they are expensive to move, slow to establish, and impossible to retrofit without disrupting the entire planting scheme.
Structure plant categories
Trees (shade, screening, specimen)
One or two trees set the vertical scale of the entire garden. Choose for mature height and canopy spread, not for what they look like in a 10-litre pot. A tree that matures at 12 metres in a 6-metre-wide garden will dominate everything within a decade. Confirm the mature dimensions, confirm the root spread relative to foundations, and confirm the zone rating before purchasing.
Large shrubs (hedge, framework)
Hedges and large shrubs create compartments, hide boundaries, and provide the mid-height framework that smaller plants sit against. Evergreen options (yew, holly, laurel, box) give winter structure. Deciduous options (beech, hornbeam) give seasonal change but lose density in winter.
Evergreen backbone
Even in a garden heavy on perennials and grasses, at least 30 percent of the planting volume should be evergreen. This is what stops the garden looking bare from November to March. Position evergreens where they will be most visible from the house in winter.
Sequencing rule
Never buy perennials, grasses, or groundcover until all structure plants are confirmed and ideally planted. Structure determines available light and root competition for everything below it. Placing perennials first and trees second is like furnishing a room before building the walls.
Layer by Height
With structure plants placed, fill the remaining space in three height layers. This creates depth, ensures every plant is visible from the primary viewing angle, and prevents tall plants from shading shorter ones in the same bed.
| Layer | Height | Role | Examples |
|---|---|---|---|
| Tall (back) | 150cm+ | Background screening and vertical drama | Miscanthus, Verbena bonariensis, tall delphiniums, Eupatorium |
| Medium (mid-border) | 60–150cm | Main flowering volume and seasonal colour | Echinacea, Salvia, Phlox, Achillea, Helenium, Crocosmia |
| Front (edging) | Below 60cm | Ground cover, edge definition, and weed suppression | Geranium, Alchemilla, Heuchera, low grasses, Nepeta |
The two-season rule
Each height layer should have interest in at least two seasons. This does not mean every plant must flower twice. It means the layer as a whole — counting foliage texture, seed heads, autumn colour, and winter structure — should contribute something visible for at least six months of the year.
- Spring interest: fresh foliage emergence, early perennial bloom, bulb integration at the front
- Summer interest: peak flower from mid-border, grasses gaining height at the back
- Autumn interest: seed heads, ornamental grasses at peak, late-season perennials (helenium, aster)
- Winter interest: evergreen ground cover at the front, dried grass structure at the back
For a full guide to choosing perennials by height and season, see Perennials for Your Garden.
Plan for Succession (Bloom Calendar)
A bloom calendar is a month-by-month view of what is flowering, fruiting, or contributing structural interest at any point in the year. Without one, most gardens peak in June and go quiet by August. The calendar exposes gaps before you plant them into existence.
How to build the calendar
- List every plant from steps 2 and 3 in a spreadsheet or table
- For each plant, mark its flowering months on a 12-column grid (January through December)
- Also mark non-flowering interest: foliage colour, seed heads, bark, berries
- Scan for months with fewer than two plants contributing visible interest — those are your gaps
- Fill gaps by adding plants whose peak falls in the empty months
The July–August gap
The most common calendar gap is mid-to-late summer. Spring perennials (geraniums, aquilegia, lupins) have finished flowering. Autumn performers (asters, anemones) have not started. The garden can look tired and green with no focal colour.
Plants that fill this gap reliably:
Dahlias
Agapanthus
Helenium
Ornamental grasses
Crocosmia
Echinops
Rudbeckia
Kniphofia
For a complete month-by-month calendar with zone-specific timing, see our Seasonal Planting Calendar.
Build the Shopping List and Planting Calendar
With plants selected and gaps filled, convert the plan into two actionable documents: a shopping list (what to buy and how many) and a planting calendar (when to plant each item for the best establishment).
Quantity: calculate by spacing
Every plant has a mature spread listed on its label or in reference guides. Divide the available bed area by the coverage of each plant to calculate quantity. For perennials and grasses, the standard formula is:
A plant with a mature spread of 45cm needs 0.45m spacing. For a 3m² section: 3 ÷ (0.45 × 0.45) = roughly 15 plants. Round up rather than down — gaps look bare for two years while you wait for plants to fill.
Timing: when to plant what
- Bare-root plants (trees, roses, hedging): November to March while dormant. Cheapest option and establishes well if planted in prepared ground before spring growth
- Container-grown plants: year-round in theory, but spring and autumn give the best establishment with natural rainfall and moderate temperatures
- Bulbs: spring-flowering bulbs (tulips, daffodils, alliums) go in during September to November. Summer-flowering bulbs (dahlias, gladioli) go in after last frost in spring
- Seeds: start indoors 6–8 weeks before last frost for tender annuals; direct sow hardy annuals and wildflowers in early autumn or after last frost
Budget: phase the planting if needed
Structure plants are the most expensive items on the list. A single semi-mature tree can cost as much as the entire perennial layer. If budget is tight, phase the work: install structure plants and hedging in year one (they need the most time to establish), fill mid-border perennials in year two, and complete edging and ground cover in year three. The garden develops in the correct structural order regardless.
Planting Guide Template
Use this table format as a starting point. Each row represents one plant species in your plan. Fill every column before purchasing — any blank cell means a decision has been deferred rather than made.
| Plant | Zone | Height | Spread | Bloom | Position | Qty | Plant When |
|---|---|---|---|---|---|---|---|
| Amelanchier lamarckii | 4–8 | 5m | 4m | Apr | Specimen, full sun | 1 | Nov–Mar (bare root) |
| Taxus baccata (hedge) | 6–9 | 2m (clipped) | 60cm | — | North boundary screen | 12 | Oct–Mar (bare root) |
| Miscanthus sinensis | 5–9 | 180cm | 90cm | Aug–Oct | Back of border, full sun | 3 | Mar–Apr (container) |
| Echinacea purpurea | 3–9 | 90cm | 45cm | Jul–Sep | Mid-border, full sun | 9 | Mar–May (container) |
| Geranium Rozanne | 5–8 | 50cm | 60cm | Jun–Oct | Front edging, part shade OK | 7 | Mar–May (container) |
| Tulipa Queen of Night | 3–8 | 60cm | 15cm | May | Front/mid weave, full sun | 50 | Oct–Nov (bulb) |
| Dahlia Bishop of Llandaff | 8–11 | 100cm | 45cm | Jul–Oct | Mid-border, full sun, stake | 5 | May (tuber, after frost) |
| Alchemilla mollis | 3–8 | 40cm | 50cm | Jun–Jul | Front edging, any aspect | 11 | Mar–Apr (container) |
Template tip
Sort the table by planting season so you can read it as a timeline. Everything planted November to March goes in one purchase order. Spring container plants go in a second order. Bulbs in autumn are a third. This groups your nursery visits and keeps you from making four trips for three plants each time.
How Hadaa Automates Steps 1–5
The five-step process above works. It also takes hours of research, spreadsheet work, and cross-referencing zone data with nursery stock. Hadaa compresses the entire workflow into a single photo upload.
What happens when you upload a photo
Upload a photo of your garden to Hadaa. The system analyses your yard, identifies your USDA zone from your location, assesses light conditions and available space from the image, and produces a complete planting guide with every column in the template above filled automatically.
- USDA zone detection and zone-verified plant selection
- Plants layered by height with succession bloom across all seasons
- Quantities calculated from mature spread for your specific bed dimensions
- Planting calendar with bare-root, container, and bulb timing by season
- 22 photorealistic renders showing the planting scheme in your actual garden
The process that takes hours manually is completed in minutes. Every project includes a personal onboarding call so you get the most from your planting guide and design.
Related reading
Frequently Asked Questions
What is a planting guide and why do I need one?
How do I find my USDA hardiness zone?
What are structure plants and why do they go in first?
How do I identify gaps in my bloom calendar?
Can Hadaa generate a planting guide from a photo of my garden?
Skip the Manual Work
Get a Zone-Matched Planting Guide — Upload One Photo
Hadaa turns a single garden photo into a complete planting guide — zone-verified plants, quantities calculated from spacing, a bloom calendar with no gaps, and a planting timeline by season. Every project includes a personal onboarding call. Pay once. No subscription required.