One zone 5b lot on a former pasture, sandy loam over clay, exposed west wind, mature sugar maples on the north fence. USDA hardiness zone 5a at the lowest corner, 5b on the slope, 6a against the house wall.
Caledonia Garden Centre — zone 5 and 6 gardening guides
137 Field-tested guides
8 Years publishing garden notes
12,000+ Readers across zones 3–8
-20 F Average winter low we design for
The library
Browse by topic
Eight guides, each a doorway into a corner of the garden. Pick the one that matches the problem in front of you.
16 guides
Climbing plants: vines for trellises, fences, walls, and pots
Climbing plants for trellises, fences, and pots: flowering vines, low-maintenance and non-invasive picks, indoor climbers, and deer-resistant options.
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18 guides
Container gardening: growing more in pots and tight spaces
Container gardening for small spaces and renters: potatoes, rhubarb, shrubs, roses, succulents, water gardens, and perennials grown in pots.
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12 guides
Garden tools: pruning gear and soil basics that actually matter
Garden tools and soil basics: pruning tools for apple, grape, palm, and bonsai, long-handled options, and how garden soil differs from potting mix.
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16 guides
Ornamental grasses: a practical guide for cold-winter gardens
Ornamental grasses for cold-winter gardens: full-sun and shade varieties, deer-resistant picks, dwarf and tall types, and when to cut them back.
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25 guides
Perennial flowers: a complete guide to plants that return each year
Perennial flowers that return every year: shade-tolerant varieties, zone 5 and 6 picks, deer-resistant options, and long-blooming garden choices.
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19 guides
Plant care tips: fixing the problems that stall common plants
Plant care tips for common problems: overwintering tomatoes and peppers, root-bound houseplants, and why roses, lavender, and hibiscus won't bloom.
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12 guides
Raised bed gardening: build, fill, and plant beds that last
Raised bed gardening for beginners: building and filling beds, growing potatoes and tomatoes, fencing, tools, lasagna layering, and the trade-offs.
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19 guides
Shade plants: low-light picks that hold up year after year
Shade plants that thrive in low light: deer-resistant varieties, evergreens for shade, potted porch options, ground covers, and dry-shade survivors.
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What gardeners are reading
perennials
Perennial mums: getting garden mums to come back in zone 5
Perennial mums, or hardy garden mums, can return for years in zone 5 if planted in spring. The fall florist mums in pots usually die over winter.
perennials
Are tulips perennial plants? The honest answer for zone 5
Yes, tulips are perennial but most hybrids decline after 3 seasons. Species tulips and Darwin hybrids return for years in well-drained soil.
perennials
Perennial wildflower seeds: how to sow them in zone 5
Perennial wildflower seeds are cheap and cover large areas but need cold stratification and patience. Here is how to sow them for a zone 5 garden.
perennials
What are perennials? A plain guide for cold gardens
Perennials are plants that live more than two years and regrow from their roots each spring. Here is what that means for a zone 5 garden.
How we work
What "field-tested" actually means here
New plants go in the ground in spring only, get one full season of establishment watering, then are judged on what they do in years two and three. Plants that need heroic effort to survive a normal winter are moved on.
Cross-checked against Missouri Botanical Garden Plant Finder, USDA NRCS Plants Database, the Royal Horticultural Society plant selector, and extension publications from the universities of Minnesota, Cornell, Penn State, and Oregon State.
Latest dispatches
Newest from the trial bed
Fresh guides, updated picks, and the occasional postmortem on a plant that did not make it.
garden tools
Best gardening tools for Canadian Zone 5-6 gardeners
The best gardening tools for Canadian Zone 5-6 gardens: a Felco F-2 pruner, a Nisaku hori-hori, and a Fiskars lopper. Buy fewer, better tools that last.
30 Jun 2026 shade plantsSmall shade plants for borders that edge a bed in low light
Small shade plants for borders include miniature hostas, coral bells, foamflower, lungwort, and dwarf astilbe to edge a bed neatly in low light.
20 Jun 2026 shade plantsShade tolerant deer resistant plants that survive both problems
Shade tolerant deer resistant plants include hellebore, ferns, brunnera, lungwort, and barrenwort. Deer skip them for bitter sap and tough leaves.
16 Jun 2026 shade plantsShade plants that bloom all summer for nonstop low-light color
Shade plants that bloom all summer include impatiens, fuchsia, begonia, browallia, and torenia. Most are annuals, since few shade perennials bloom nonstop.
12 Jun 2026 shade plantsShade plants for pots that fill containers in low light
Shade plants for pots include hosta, fern, coral bells, caladium, and astilbe. Foliage carries a shaded container all season with no flowers needed.
8 Jun 2026 shade plantsShade loving flowering plants that bring color to low light
Shade loving flowering plants include astilbe, impatiens, bleeding heart, foamflower, hellebore, and fuchsia for color across spring and summer in low l...
5 Jun 2026 shade plantsShade evergreen plants for year-round structure in low light
Shade evergreen plants like hellebore, Christmas fern, barrenwort, wild ginger, yew, and boxwood hold structure through winter in a cold shade garden.
1 Jun 2026 shade plantsShade cloth for tomato plants: when and how to use it in heat
Shade cloth for tomato plants protects fruit during heat waves. Use 30 to 40 percent cloth over the hottest afternoon hours, not all season long.
28 May 2026 Why this matters
The numbers behind a working garden
1 in 3
bites of food in the North American diet depend on animal pollination, with bees doing the bulk of the work (Pollinator Partnership).
-20 F
is the average annual extreme minimum for USDA zone 5b, the lower end of the band our trial bed sits in (2023 USDA Plant Hardiness Zone Map).
7,500+
plants have been grown and recorded at the Missouri Botanical Garden Kemper Center, the data backbone of our perennial recommendations.
3-8
is the typical hardiness range for the perennials we recommend most often, giving at least two zones of margin for climate variability.
Hands in the soil
Who writes this
Two working gardeners, one shared trial bed, eight years of notes.
David Chen
David spent six years working at a retail nursery before turning to writing. He specialises in ornamental grasses, climbing plants, plant care, garden tools, and soil science. He has written for Caledonia Garden Centre since 2019.
Margaret Sinclair
Margaret has over thirty years of hands-on experience with perennials and shade plants. She specialises in perennials, shade plants, container gardening, and raised bed gardening. She has written for Caledonia Garden Centre since 2018.