Use the free Wood Chip Compost Planner below, right in your browser. No sign-up, no software to install, and nothing is sent to a server.
Wood chips are the slow food of the compost world, and planning them well saves both money and disappointment. A wood chip compost planner does two jobs at once: it works out how many cubic metres you need for a path or a pile, and it explains the nitrogen story that makes fresh chips tricky near hungry plants. Enter your path size and chip age, and the tool gives you a volume, a settling allowance, and a nitrogen note you can act on.
Chips break down slowly because wood is mostly lignin and cellulose, tough materials that fungi chew through over months rather than weeks. A chip pile therefore takes one to two years to become dark, crumbly compost, while a chip path lasts one to two years before it needs topping up. That slowness is not a flaw: the long breakdown feeds soil fungi, improves structure, and gives you a free, attractive mulch in the meantime.
Fresh chips borrow nitrogen, and this is the fact every chip user must understand. Microbes breaking down carbon-rich wood need nitrogen to do their work, and they take it from the surrounding soil first. Plants growing in that soil then show yellow leaves and slow growth, not because chips poison them, but because the microbes got to the nitrogen first. The effect is temporary and strongest in the top few centimetres, but it is real enough to plan around.
The practical rule is simple: fresh chips are fine on paths and around trees and shrubs, but keep them off vegetable beds and away from hungry annuals until they have aged. Aged chips, left in a pile for six months or more, have already passed the worst of the nitrogen borrowing, and they are much safer near plants. If you only have fresh chips and want to compost them, add nitrogen-rich material like fresh grass, coffee grounds, or manure to feed the microbes directly.
Volume planning matters because chips are usually delivered by the cubic metre, and guessing wrong means a half-finished path or a second delivery charge. The planner multiplies length by width by depth to give cubic metres, and it reminds you to order extra for settling. Fresh chips sink by roughly a fifth in the first months as they compress and start to break down, so a path planned at eight centimetres deep will soon look thinner unless you top it up.
Building a chip path is straightforward. Clear weeds first, lay cardboard or a few layers of newspaper to block regrowth, wet it well, then spread chips eight to ten centimetres deep. Rake them level, keep them off plant stems, and edge the path with boards or stones so chips stay where they belong. A chip path drains well, stays mud-free in rain, and feels pleasant underfoot, which is why allotments and forest gardens use them so widely.
A chip compost pile needs a different approach from a kitchen-scrap pile. Build it at least one cubic metre in size, mix in nitrogen-rich greens as you go, keep it damp, and turn it every month or two rather than every week. Fungi do most of the work on wood, and they dislike constant disturbance. After a year, the bottom of the pile should be dark and crumbly even if the top still looks like chips, and you can sieve the finished part for use.
Finished wood chip compost is superb for perennials, fruit bushes, roses, and trees. It holds water, feeds fungi, and leaves a soft, open soil that roots love. Dig it into planting holes for shrubs, or spread it as a mulch two to five centimetres thick around established plants, keeping it clear of stems. For vegetables, mix it with richer compost or aged manure so the bed gets both structure and immediate nutrients.
Sourcing chips is often free. Tree surgeons and councils regularly need to dispose of chipped branches, and many will deliver a load to a nearby garden for free or for a small charge. Ask what tree species are in the load, and avoid large amounts of conifer chips for vegetable beds, since they break down slowly and lean acidic. Mixed hardwood chips are the best all-round choice for most gardens.
Store spare chips in a loose pile with air around them, not sealed in bags where they go slimy. A chip pile heats a little at first, especially if it contains fresh leaves, so keep it away from fences and buildings until it cools. After a few months the pile settles, darkens at the bottom, and becomes the aged chip supply your beds will thank you for. Label the pile with its start date so you know when six months have passed.
Try the tool above with your own path measurements, print the plan if it helps, and order with confidence. Wood chips reward patience more than any other compost material, and a planned chip path or pile is a garden investment that pays back for years in better soil and cleaner paths.
Versión en español: Planificador de Compost con Astillas de Madera Con Plan Imprimible