The Sow library

Everything worth knowing about what you grow

11,945 outdoor plants, each with its zones, mature size, bloom window, care calendar and current price — plus the guides, calendars and companion pairings that turn a catalog into a garden.

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Written by our team

Guides and growing advice

The long-form stuff: how to grow it, how to design with it, and how to fix it when it sulks.

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Plant care library

34 guides

In-depth growing guides, genus by genus — light, soil, water, pruning, propagation, and the mistakes to avoid.

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Garden & design guides

10 guides

Borders, groupings, colour and structure — how to make a planting look deliberate rather than accidental.

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Start here

Find the right plant

Narrow the catalog to what will actually survive, and actually suit the site.

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Browse by hardiness zone

Zones 4–10

The first filter that matters: what survives your winter. Each zone hub ranks its plants by how many gardeners actually grow them.

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Hand-painted map of a town with native wildflowers and grasses growing through the streets

Native plants by city

831 cities

A zone tells you what survives. This tells you what belongs — the trees, shrubs and grasses genuinely native to where you garden.

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Herbarium-style illustration of many botanical specimens laid out in rows

The genus index, A–Z

1,064 genera

Every genus we track, from Acer to Zinnia — each with all of its varieties ranked, and a growing guide built from their real care data.

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Search the full catalog

11,945 plants

Filter by zone, sun, soil, size and style — or just look something up by name.

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16 best-of lists

Plants for a particular job

Deer eating everything? A shady corner that defeats you? Start from the problem — each list is ranked by what gardeners actually plant.

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All best-of lists in one place

16 lists

Numbered answers to “best X” — ordered by how many gardeners plant each one.

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Companion planting guides

40 genera

What people genuinely plant together, measured across tens of thousands of real designs — not folklore.

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Four perennials laid out side by side like a designer's planting palette

Ready-made planting lists

58 lists

Whole combinations rather than single plants — designer palettes, starter packs, perennial duos and borders built to carry a season.

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Month by month

Know what to do, and when

The jobs that matter this month, and the exact plants that need each one.

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The garden calendar

12 months · by zone

Prune, divide, feed, plant — built from the real care schedules of the plants gardeners grow, and filtered to your hardiness zone.

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The planting guide

What to plant where, how far apart, and how to give it the best possible start in the ground.

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Before you buy

Pay the right price

We check what the nurseries are asking, every day. We earn nothing when you buy — it is here so you can time it well.

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Today's plant price drops

Updated daily

Every plant that costs less today than it did a month ago — measured against its own price history, not a retailer's “was” price.

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The Sow Plant Price Index

Is this actually a good week to buy? The index tracks how widely plants are discounted against their own recent norm.

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Price sheets by genus

71 genera

What a hosta or a hydrangea actually costs right now, variety by variety — gathered from live nursery listings, not a catalogue.

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Free planning tools

A clearer answer before you buy or dig.

Check a plant, plan a bed, price out mulch, or turn a yard photo into a useful starting point. Every tool is free and works without an account.

Your next garden

Garden Plan From a Photo

Upload a photo of your yard or garden bed and get a planting approach with a recommended plant list.

Choose a style and get a plan made for your space.

Right plant, right place

Plant Hardiness Checker

Check whether a specific plant is likely to survive winter where you live.

Get a clear yes, no, or reason to be cautious.

Plan your vegetable bed

Plant Spacing Calculator

See how many vegetables, herbs, or flowers will fit in your raised bed or plot.

Choose from 199 plants and varieties in Sow.

Buy the right amount

Mulch Calculator

Find out how many bags or cubic yards of mulch your garden bed needs.

Works for new beds, old mulch, and areas around trees.

See where gardens are dry

U.S. Garden Drought Map

Watch garden dryness change across the continental U.S. over the last two weeks.

Press play to watch the map change day by day.