Plant Spacing Calculator

How the Plant Spacing Calculator Works

This plant spacing calculator takes your garden bed dimensions and chosen crop to determine exactly how many plants fit. It supports three layout methods: traditional row planting, intensive square foot gardening and triangular offset planting. Each layout uses the recommended spacing distance for your selected crop to compute the number of plants, rows and columns. The visual grid preview shows you exactly where each plant goes, making it easy to plan your garden bed before you start planting. All calculations run entirely in your browser with no data sent anywhere.

Plant Spacing Methods Compared

Row planting is the traditional method where plants are placed in straight lines with equal spacing between plants and between rows. It works well for large gardens and crops that need cultivation access. Square foot gardening uses a grid pattern where plants are spaced evenly in both directions, maximizing the number of plants per square foot. Triangular or offset planting staggers every other row by half the spacing distance. This hexagonal pattern fits approximately 15% more plants than a square grid while maintaining the same distance between each plant and its neighbors. Offset planting is ideal for intensive raised bed gardening where you want maximum yield from limited space.

Recommended Spacing for Popular Vegetables

Proper plant spacing is critical for healthy growth and maximum harvest. Large plants like tomatoes, squash and zucchini need 24 inches between plants. Medium crops like peppers, broccoli and kale need 18 inches. Compact plants like lettuce and spinach only need 6 inches. Root vegetables vary widely — carrots and peas need just 3 inches while potatoes need 12 inches. Herbs generally do well at 8-12 inches apart. When in doubt, check the seed packet for the recommended spacing and use this calculator to see how many plants fit in your available space.

Tips for Maximizing Your Garden Bed

Use triangular offset planting to fit up to 15% more plants without crowding. Combine companion plants that benefit each other — for example, basil planted between tomatoes can improve flavor and repel pests. Succession planting lets you harvest one crop and immediately plant another in the same space. For raised beds, square foot gardening is one of the most efficient methods since every inch of soil is used productively. Consider vertical growing for vining crops like cucumbers and peas to free up ground space for other plants. Mulching between plants suppresses weeds and retains moisture, reducing maintenance time throughout the growing season.