Garden Tools & Calculators
Free calculators and planners for gardeners — watering, planting, composting, soil, and fertilizing.
Tree Spacing Calculator
Find how many trees fit your space and the right spacing from each species' mature canopy spread
Tree Age Estimator
Estimate a tree's age from its trunk circumference and species, using the growth-factor method
Mulch Calculator
Calculate mulch for tree rings and beds — cubic feet, cubic yards, bags, and weight
Tree Canopy & Shade Calculator
Estimate the canopy area and shade footprint of your trees from their crown diameter