Quick Answers

Pre-calculated answers to the most common gardening questions. Click any question for the full breakdown, then customise it with the linked calculator.

Soil & Compost

How long does compost take?

Hot composting takes 8-12 weeks; cold composting takes 6-12 months

How much compost do I need?

A 1.8 × 1.2 m raised bed at 30 cm deep holds 648 litres: 17 × 40 L bags

Paving & Paths

How many paving slabs do I need?

A 12 m² patio needs 66 slabs at 450 mm or 38 at 600 mm, including 10% wastage