How does the planner estimate plant count?

It divides usable planting area by the area assigned to one plant. A square grid uses spacing squared; a triangular grid uses about 0.866 times spacing squared. The result is rounded down for bed-capacity planning.

What plant spacing should I enter?

Use the expected mature spread or recommended on-center spacing for the plants you intend to use. For a mixed bed, enter a representative average and refine the final layout species by species.

Why plan for spring, summer, and fall flowers?

Pollinator groups are active at different times. A sequence of locally appropriate flowers across the growing season reduces forage gaps compared with a garden that blooms only at one peak.

Does one species count in more than one bloom season?

Yes. The seasonal rows are planning roles, not necessarily unique species. A long-blooming plant may fill more than one role, so review the final list for true bloom overlap and local timing.

Does the planner recommend specific plants?

No. Plant suitability and bloom timing vary by region, cultivar, soil, light, and moisture. Use the worksheet with a local native plant society, extension service, conservation district, or knowledgeable nursery.

Are my garden details saved or uploaded?

No. The planner runs in your browser and does not upload or store your dimensions, site conditions, or plan.

Pollinator Garden Size and Plant Planner

Estimate how many plants fit a bed—or how much garden area a target plant count needs—then build a spring, summer, and fall planting worksheet with practical same-species groups.

Private: all planning runs in your browser. Your garden details are not uploaded or saved.

Garden and planting inputs

1. Choose what to calculate

I know the bed size
Estimate plant capacity. I know the plant count
Estimate required bed area.

Measurement system

2. Measure the bed

Bed shape

Length

Width

3. Set access and spacing

Area reserved for paths or features

Use 0% if the entered dimensions already exclude paths.

Representative on-center spacing

Use mature spread or label spacing; mixed beds are an approximation.

Planting pattern

Preferred same-species group

A layout aid, not a biological requirement.

4. Balance bloom seasons

Percentages must total 100%. Each species count is a seasonal role; a long-blooming species may fill more than one role.

Spring allocation, %

Summer allocation, %

Fall allocation, %

Spring-bloom roles

Summer-bloom roles

Fall-bloom roles

5. Record site conditions

Light

Soil moisture

Locally native plant target

A planning target you choose, not a universal threshold.

Planting plan

Your area, plant count, seasonal allocation, and species worksheet will appear here.

How the garden-size estimate works

The planner uses one representative on-center spacing for the whole bed. It is most useful for an early budget and layout, before you replace generic worksheet rows with exact species and mature spreads.

Usable area = gross area × (1 − reserved percentage)
Area per plant = spacing² for a square grid, or 0.866 × spacing² for a triangular grid
Plant capacity = floor(usable area ÷ area per plant)
Required gross area = plant count × area per plant ÷ (1 − reserved percentage)

Real beds have edges, curves, unequal plant sizes, transplant losses, and existing features. Treat the result as a first-pass quantity, then draw the exact mature footprint of each selected plant. The triangular option describes staggered rows; it is about 15% denser than a square grid at the same spacing.

From worksheet to a pollinator garden

Confirm utilities, drainage, visibility, access, and any local rules before digging.
Use local native-plant resources to fill each seasonal slot with non-invasive plants suited to the recorded light and moisture.
Check actual local bloom months so flowers overlap from early spring through late fall, rather than relying only on broad season labels.
Place repeated plants in visible groups, while keeping each species' mature height and spread in the final layout.
Include nesting and overwintering structure where suitable: undisturbed soil patches, hollow or pithy stems, leaf litter, logs, or bunch grasses.
Follow plant labels and local integrated-pest-management guidance; avoid spraying flowers or active pollinators.

Regional check required: this planner deliberately does not generate species names. Native status, invasiveness, bloom time, winter hardiness, and host-plant value are location-specific.

Planning guidance and sources

USDA Natural Resources Conservation Service — Pollinator Gardens Design Guide: continuous bloom, locally native forage, site moisture, and same-species clusters.
USDA Forest Service — Attracting Pollinators to Your Garden: bloom through the growing season, plant diversity, native plants, and larger patches.
USDA NRCS and Xerces Society — Habitat Assessment Guide for Yards, Gardens, and Parks: separate spring, summer, and fall forage checks plus nesting and host-plant features.
University of Minnesota Extension — Habitat for pollinators: varied bloom times and year-round nesting habitat such as soil, stems, logs, and leaf litter.

Sources inform the planning workflow, not the geometric capacity formula. Reviewed August 3, 2026.

Frequently asked questions

How accurate is the plant count?

It is a geometric estimate based on one spacing value. Accuracy improves when the bed is simple, the reserved-area estimate is realistic, and selected plants have similar mature spreads. Refine mixed borders plant by plant.

Should spacing equal the plant's mature width?

That is a useful first approximation, but follow the label or local grower guidance. Some plants spread, self-seed, form colonies, or need airflow that changes the appropriate spacing.

Why use repeated groups?

Groups create a practical layout and can make a floral resource easier to find. The selected group size is only an organizer; site size, plant habit, design, and target pollinators may justify a different pattern.

Can one plant fill two seasonal slots?

Yes. If a species reliably blooms across two local periods, you can enter it in both worksheet roles. Do not double-count its physical plants when translating the worksheet into a final map.

What if the plan cannot fit every species role?

The planner flags roles receiving fewer plants than requested species. Reduce the number of roles, choose tighter-spaced plants, enlarge the bed, or let locally verified long-blooming species cover more than one season.

Does a pollinator garden need full sun?

No. Sunny sites often have many choices, but partial shade and shade can also support locally appropriate flowering plants. Match every selection to the measured light and soil moisture.

Does the planner save my inputs?

No. Calculations, copying, and the CSV worksheet all happen locally in your browser.

Pollinator Garden Size and Plant Planner

Garden and planting inputs

Planting plan

How the garden-size estimate works

From worksheet to a pollinator garden

Planning guidance and sources

Frequently asked questions

Explore more tools