Garden and outdoor planning calculators: how much seed, turf, soil, mulch and compost a bed or border needs, how many plants fit at a given spacing, how much irrigation your borders actually draw, and what fences, paths and patios add up to. Garden and Outdoor Calculators.
Nearly every garden calculation starts with one number: how much ground there is. Seed rates, mulch depths, fertiliser doses, turf quantities and edging lengths are all quoted per square metre, and every one of them is wrong if the area…
A fertiliser label says 50 millilitres per square metre. A weedkiller says 5 litres per hectare. An American guide says 2 gallons per thousand square feet. They are all rates, and none of them can be compared with the others…