Plant Spacing Calculator

Plant Spacing Calculator. Gardening with limited space means every inch counts — the Plant Spacing Calculator tells you exactly how many plants fit in your garden, or how much space a given number of plants needs. Enter your Garden Area, Plant Spacing (center-to-center distance), and Number of Plants, then select a Spacing Pattern (square or triangular) to get your Calculated Result, along with Plants per Square Foot and Coverage Efficiency. Also try the find Stomatal Conductance (Gs) with Stomatal Conductance Calculator.

Results

Calculated Result

Plants per Square Foot

Coverage Efficiency

What's the difference between square and triangular spacing patterns?

Square spacing arranges plants in a grid pattern, while triangular (offset) spacing staggers every other row. Triangular spacing typically allows for about 15% more plants in the same area and provides better coverage. See also our Fertilizer Required — Water-Soluble Fertilizer.

How do I determine the right spacing for my plants?

Check the plant's mature spread and use 50-75% of that measurement for spacing. Closer spacing fills in faster but costs more, while wider spacing is more economical but takes longer to achieve full coverage.

Can I use this calculator for any type of plant?

Yes, this calculator works for any plant type including groundcovers, shrubs, perennials, and annuals. Just adjust the spacing based on the mature size of your specific plants.

How many plants do I need for quick coverage?

For quick coverage, use spacing at the lower end of the plant's recommended range. This typically means 1.5-2 times the plant's mature spread, resulting in full coverage within 1-2 growing seasons.

What if my garden area is an irregular shape?

For irregular shapes, break your garden into rectangular sections and calculate each separately, then add the totals together. This gives you a more accurate plant count than using the total area.

Should I account for plant mortality when ordering?

Yes, it's wise to order 5-10% extra plants to account for potential losses due to transplant shock, weather, or other factors. This ensures you have replacements available.

How does soil quality affect plant spacing?

In rich, well-draining soil, plants may grow larger and need wider spacing. In poor soil, plants stay smaller and can be spaced closer together. Adjust spacing based on your soil conditions and expected plant performance.

When is the best time to plant for optimal spacing results?

Plant during the optimal season for your plant type and climate zone. Spring and fall are generally best for most plants, allowing them to establish before extreme weather and achieve the spacing calculations more predictably. You might also find our Compost Calculator useful.