Garden Guides
Practical, in-depth guides that go with our calculators: how much to buy, how to space and plan, and how to make sense of the numbers in a real garden.
Overwatered or Underwatered? How to Tell What Your Plant Needs
Drooping leaves can mean too much water or too little. Here is how to tell the difference from the leaves, soil and…
Read guideHow Often to Water Potted Plants (and How Much)
Potted plants dry out far faster than garden beds. Here is how often to water by pot size, plant and season, and…
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Mulch, Compost or Topsoil? What Each Does and How Much to Buy
They come in similar bags, but mulch, compost and topsoil do very different jobs. Here is when to use each, how deep…
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Rainwater Harvesting at Home: How Much Can Your Roof Collect?
Every millimetre of rain on your roof is free water for the garden. Here is how to estimate what you can collect…
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Grow Your Own Bouquets: Planning a Cut Flower Patch Week by Week
A cut flower patch can fill a vase every week from early summer to frost. Here is how to work back from…
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How Many Vegetable Plants Per Person? Plan by Servings, Not Guesswork
Plants-per-person charts ignore what your family actually eats. Here is a better way to plan: start from servings, use realistic yields and…
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Square Foot Gardening: Plants per Square Chart and Planning Guide
Square foot gardening packs a lot of food into a small bed. Here is the plants-per-square chart, how to lay out a…
Read guideHow Much Soil Do I Need for a Raised Bed? A Practical Guide
Raised beds hold far more soil than they look. Here is how to work out the volume, choose a mix, allow for…
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Cut Flowers & Bouquets
Plan stems, recipes and weekly bouquet production.
8 calculators →Balcony & Small-Space Gardens
Window boxes, vertical pockets and container layouts.
8 calculators →
Seed Starting & Propagation
Seed tape, shelf and tray planning for indoor starts.
10 calculators →
DIY Garden Projects
Cut lists and material counts for trellises, netting and edging.
12 calculators →Kitchen Garden & Harvest
Grow the right amount for your household, week by week.
10 calculators →Soil, Compost & Mulch
Volumes, bags and bulk loads for soil, compost and mulch.
10 calculators →Planting & Spacing
Plant counts, square foot grids and bed layouts.
11 calculators →Water & Irrigation
Rainwater, watering and irrigation planning.
13 calculators →
Lawn & Turf
Grass seed, sod and lawn care quantities.
3 calculators →
Fertilizer & Soil Testing
Soil pH, lime, N-P-K, manure and soil tests made practical.
14 calculators →
Greenhouse, Indoor & Hydroponics
Heaters, grow lights, VPD and hydroponic systems.
8 calculators →
Planting Dates & Climate
Frost dates, planting calendars, GDD and chill hours.
8 calculators →
Trees, Land & Costs
Tree spacing, age and value, plus project cost estimates.
9 calculators →