Calgary, AB — Planting Guide
Calgary is in USDA Zone 5a. The average last spring frost is May 7 and the first fall frost is October 14, giving you a growing season of approximately 160 days.
At an elevation of 3,428 ft, Calgary receives approximately 26.9 in of rainfall annually. Summer highs average 75°F with winter lows around 14°F. The predominant soil type is Dark Brown Chernozem.
🌡️ Zone
5a (-20°F to -15°F min)
❄️ Last Frost
May 7
🍂 First Frost
October 14
📅 Growing Season
160 days
⛰️ Elevation
3,428 ft
🌧️ Annual Rainfall
26.9 in
Monthly Watering Calendar
When you'll need to water your garden — based on average monthly rainfall vs. the ~1 inch/week most gardens need.
View detailed monthly data
| Month | Avg Rainfall | Rainy Days | Extra Water Needed | Watering Effort |
|---|---|---|---|---|
| Jan | 1.1 in | 7 days | — | None |
| Feb | 1.2 in | 6 days | — | None |
| Mar | 2.1 in | 8 days | — | None |
| Apr | 2.5 in | 10 days | 1.8 in | High |
| May | 3.3 in | 10 days | 1 in | Moderate |
| Jun | 3.3 in | 9 days | 1 in | Moderate |
| Jul | 3.1 in | 8 days | 1.2 in | Moderate |
| Aug | 2.9 in | 9 days | 1.4 in | Moderate |
| Sep | 2.1 in | 8 days | 2.2 in | High |
| Oct | 2 in | 9 days | 2.3 in | High |
| Nov | 1.9 in | 7 days | — | None |
| Dec | 1.4 in | 7 days | — | None |
Annual total: 26.9 in. Water needs vary by crop — tomatoes need ~1.2"/week while herbs like rosemary need only 0.3"/week. Check individual plant pages for crop-specific water budgets that factor in your county's rainfall and soil drainage.
Calgary Soil Profile
Soil Type
Dark Brown Chernozem
Soil pH
6.0-7.0
Drainage
Well Drained
Gardening Difficulty Score
Calgary is a very forgiving place to garden. Most plants thrive here with minimal effort.
Local Gardening Help in Calgary
Free expert help is closer than you think. Your county's cooperative extension office connects you with trained gardeners, soil testing labs, and local programs — all specific to Calgary's climate and soil.
County Extension Office
Calgary Extension Office
Extension offices are run by land-grant universities and funded by the USDA. Their advice is free, research-based, and tailored to your county's specific conditions.
Master Gardener Program
Free gardening help from trained volunteers
Master Gardeners are community volunteers who complete 40–60 hours of university horticultural training. They answer gardening questions, diagnose plant problems, and offer workshops — all free.
Many extension offices run a Master Gardener hotline where you can call or email with photos of plant problems for free diagnosis.
Soil Testing
Available through your extension office
Before amending your soil, get it tested. Your extension office offers soil testing (typically $10–$25) that tells you exact pH, nutrient levels, and amendment recommendations specific to what you want to grow.
Services Available in Calgary
Finding local nurseries & garden centers in Calgary
Why Buy Local
Local nurseries carry plants that are proven to grow in your area. Staff can give you advice specific to Calgary's soil and climate that big-box stores can't. Plants from local growers are typically hardier because they're already acclimated to your zone.
How to Find Them
Search for "nurseries near Calgary AB" or "garden center Calgary" on Google Maps. Also check with your extension office — they often maintain lists of reputable local nurseries and plant sales.
Community gardens & gardening groups
Community gardens are a great way to learn from experienced gardeners in your area, especially if you're limited on space. Search "community garden Calgary AB" or check your extension office and local parks department. Facebook groups like "Calgary Gardeners" or "Alberta Gardening" are also excellent for local advice and plant swaps.
What to Plant After Your Harvest
After your first crops finish, use the remaining frost-free days to grow a second round.
Show 6 more succession options
Sunlight & Day Length
Monthly daylight hours and peak sun — critical for onion varieties, photoperiod-sensitive plants, and solar garden planning.
Longest Day
16.3 hours
Summer solstice daylight
Shortest Day
7.7 hours
Winter solstice daylight
Peak Sun Hours
10.1 hr/day peak (summer)
Peak sun hours (green dashed line below) account for cloud cover — this is the usable direct sunlight your garden actually receives. Most vegetables need 6+ peak sun hours.
Onion tip: Your long summer days (14+ hours) support long-day onion varieties like Walla Walla, Sweet Spanish, and Ailsa Craig.
View detailed monthly data
| Month | Daylight Hours | Peak Sun Hours | Day Length |
|---|---|---|---|
| January | 8.2 hr | 3.3 hr | Short day |
| February | 9.7 hr | 4.2 hr | Short day |
| March | 11.5 hr | 5.5 hr | Short day |
| April | 13.6 hr | 6.7 hr | Neutral |
| May | 15.3 hr | 9.2 hr | Long day |
| June | 16.3 hr | 9.7 hr | Long day |
| July | 15.9 hr | 10.1 hr | Long day |
| August | 14.4 hr | 9 hr | Long day |
| September | 12.4 hr | 7.3 hr | Neutral |
| October | 10.4 hr | 5.4 hr | Short day |
| November | 8.6 hr | 3.4 hr | Short day |
| December | 7.7 hr | 2.9 hr | Short day |
Peak sun hours factor in typical cloud cover — use these for solar panel and shade-planning calculations.
Soil Temperature & Composting Calendar
Monthly soil temps tell you when to plant warm-season crops, and when your compost pile is actively working.
Plant Warm Crops When
Soil reaches 60°F+
Soil warm enough from Jul through Aug.
Best Month to Compost
Jul
Microbial activity peaks when soil is warm.
Active Composting
4 months
Short season — insulate pile or use indoor vermicomposting.
View detailed monthly data
| Month | Soil 4" Deep | Soil 8" Deep | Compost Activity | Time to Finish |
|---|---|---|---|---|
| Jan | 13°F | 21°F | ❄️ Dormant | ~36 weeks |
| Feb | 14°F | 19°F | ❄️ Dormant | ~36 weeks |
| Mar | 23°F | 24°F | ❄️ Dormant | ~36 weeks |
| Apr | 35°F | 35°F | ❄️ Dormant | ~36 weeks |
| May | 49°F | 45°F | 🐢 Slow | ~24 weeks |
| Jun | 59°F | 54°F | ♻️ Active | ~14 weeks |
| Jul | 67°F | 60°F | 🔥 Peak | ~8 weeks |
| Aug | 68°F | 64°F | 🔥 Peak | ~8 weeks |
| Sep | 59°F | 60°F | ♻️ Active | ~14 weeks |
| Oct | 46°F | 52°F | 🐢 Slow | ~24 weeks |
| Nov | 33°F | 38°F | ❄️ Dormant | ~36 weeks |
| Dec | 19°F | 28°F | ❄️ Dormant | ~36 weeks |
Highlighted rows = soil 60°F+ (safe for warm-season transplants). Compost finishes fastest during peak activity months.
Pest & Disease Pressure in Calgary
Computed from local climate patterns — warmer, humid conditions increase pest generations and fungal disease risk.
Insect Pest Pressure
Moderate — common pests appear but manageable with monitoring.
Disease Risk
Low disease risk — dry conditions reduce fungal problems.
Seasonal Risk
View 6 common pests in your area
| Pest | Risk Level | Peak Months |
|---|---|---|
| Aphids | Moderate | May, Jun, Jul, Aug |
| Japanese beetles | Moderate | Jun, Jul, Aug |
| Squash bugs | Moderate | Jun, Jul, Aug |
| Tomato hornworms | Low | Jul, Aug |
| Cabbage loopers | Low | May, Jun, Jul, Aug |
| Slugs | Low | Apr, May, Jun |
Organic pest management tips
- Maintain healthy soil with regular compost additions to build natural pest resistance
- Practice crop rotation annually to break pest cycles
- Encourage beneficial insects with flowering herbs like dill, fennel, and yarrow
Cover Crops for Calgary
Cover crops protect bare soil, fix nitrogen, suppress weeds, and improve soil structure — with county-specific planting dates.
Spring Cover Crops (3 options) — Build soil before the main growing season
| Crop | Plant By | Terminate | N-Fixing | Soil Benefit |
|---|---|---|---|---|
| Buckwheat | May 18 | Aug 12 | — | Rapid growth, attracts pollinators, suppresses weeds |
| Sorghum-sudan grass | May 18 | Aug 19 | — | Massive biomass, breaks compaction, suppresses nematodes |
| White clover | Apr 10 | Aug 12 | ✓ Yes | Living mulch, fixes nitrogen, permanent ground cover |
Summer Cover Crops (1 options) — Fill gaps and suppress weeds between plantings
| Crop | Plant By | Terminate | N-Fixing | Soil Benefit |
|---|---|---|---|---|
| Sunflowers | Jun 6 | Sep 30 | — | Deep roots break compaction, attract pollinators and beneficial insects |
Fall Cover Crops (6 options) — Plant after harvest to protect soil over winter
| Crop | Plant By | Terminate | N-Fixing | Soil Benefit |
|---|---|---|---|---|
| Austrian winter peas | Aug 4 | Apr 16 | ✓ Yes | Fixes nitrogen, good for heavy clay soils |
| Daikon radish | Aug 27 | Apr 23 | — | Deep taproot breaks compaction, excellent for clay soils |
| Hairy vetch | Jul 30 | Apr 23 | ✓ Yes | Excellent nitrogen fixer, good for depleted soils |
| Oats | Sep 1 | Apr 16 | — | Quick biomass, winterkills in cold zones — no spring tillage needed |
| Winter rye | Jul 15 | Apr 23 | — | Suppresses weeds, prevents erosion, breaks up compacted soil |
| Winter wheat | Jul 19 | Apr 16 | — | Erosion control, weed suppression, good biomass |
Wind & Microclimate
Wind dries soil, stresses plants, and affects frost patterns. Understanding your exposure helps with garden placement.
Seasonal Wind Speed
Spring: 14 mph Summer: 10 mph
Fall: 11 mph Winter: 13 mph
Prevailing wind: SW. Moderate wind — consider a temporary windbreak for young seedlings.
Windbreak Benefit
7.3/10
Strongly recommended — a windbreak (fence, hedge, or row of tall crops like corn or sunflowers) will significantly improve garden yields.
Frost Pocket Risk
Low
Relatively flat terrain (104 ft range). Frost pocket risk is minimal — garden placement is flexible.
Rainwater Harvesting Potential
How much water you can collect, when to collect it, and what size system you need for your garden.
Annual Collection
13,406 gal
Per 1,000 sq ft of roof area (at 80% collection efficiency)
Recommended Setup
7 rain barrels (55 gal each)
For a typical 500 sq ft garden. Serious collectors: consider a 1,750 gal tank.
Legal Status
Unrestricted
Rainwater harvesting is fully legal in your state with no restrictions.
Best Collection Months
May, Jun, Jul, Aug
Highest rainfall months — your barrels will fill up quickly during these months.
Months to Draw From Storage
Jan, Feb, Dec
Dry months when you'll rely on stored water — size your storage for this gap.
Rainwater collection tips for your area
- Your county receives approximately 26.9 inches of rain per year
- A 1,000 sq ft roof can collect roughly 13,406 gallons annually
- Rainwater harvesting is fully legal in your state
- Stock up on stored water before your dry season (Jan, Feb, Dec)
- Use a first-flush diverter to keep roof debris out of your collection
Soil & Growing Conditions in Calgary
Soil Type
Dark Brown Chernozem
Amend with compost each season to maintain fertility and structure.
Watering Needs
With 26.9 inches annually, regular irrigation is essential. Drip systems and heavy mulching conserve water.
Season Tips
160-day frost-free season
Start warm-season crops indoors and focus on short-season varieties. Cold frames extend your season by 3–4 weeks in fall.
Free Garden Planner
Plan your entire garden season — organize planting dates, track what you're growing, and know exactly when to start seeds, transplant, and harvest.
Recommended for Your Garden
Test your soil pH, nitrogen, phosphorus, and potassium levels before planting.
Get instant, accurate soil pH readings to fine-tune your amendments.
Boost soil fertility and structure with rich, well-aged organic compost.
🥬 Vegetables to Grow in Calgary
106 vegetables that grow well in Zone 5a with planting dates for Calgary.
Show all 106 vegetables with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Harvest | Days to Maturity |
|---|---|---|---|---|---|
| Acorn Squash | Apr 2 | May 14 | May 21 | Aug 13 – Sep 17 | 80–100 |
| Amaranth | Mar 12 | May 14 | May 21 | Aug 20 – Oct 8 | 90–120 |
| Arugula | Apr 2 | Apr 23 | May 7 | Jun 11 – Aug 13 | 30–50 |
| Asparagus | — | — | May 21 | — | 730–1095 |
| Beets | — | Apr 23 | — | Jun 18 – Jul 16 | 50–70 |
| Belgian Endive | Apr 2 | Apr 23 | May 7 | Aug 27 – Oct 22 | 110–150 |
| Bitter Melon | Mar 12 | May 14 | May 21 | Jul 23 – Sep 3 | 60–90 |
| Black Beans | — | May 14 | — | Aug 13 – Oct 1 | 90–120 |
| Bok Choy | Apr 2 | Apr 23 | May 7 | Jun 18 – Jul 23 | 40–60 |
| Broccoli | Apr 2 | Apr 23 | May 7 | Jul 9 – Aug 20 | 60–90 |
| Broccoli Rabe | Apr 2 | Apr 23 | May 7 | Jun 18 – Jul 23 | 40–60 |
| Brussels Sprouts | Apr 2 | Apr 23 | May 7 | Aug 6 – Oct 1 | 90–130 |
| Butternut Squash | Apr 2 | May 14 | May 21 | Aug 20 – Sep 24 | 85–110 |
| Cabbage | Apr 2 | Apr 23 | May 7 | Jul 9 – Sep 3 | 60–100 |
| Calabash | Mar 12 | May 14 | May 21 | Aug 13 – Oct 8 | 80–120 |
| Carrots | — | Apr 23 | — | Jun 25 – Jul 30 | 60–80 |
| Cauliflower | Apr 2 | Apr 23 | May 7 | Jul 2 – Sep 3 | 55–100 |
| Celeriac | Apr 2 | Apr 23 | May 7 | Aug 20 – Sep 24 | 100–120 |
| Celery | Apr 2 | Apr 23 | May 7 | Jul 30 – Sep 24 | 80–120 |
| Celtuce | Apr 2 | Apr 23 | May 7 | Jul 9 – Aug 20 | 60–90 |
| Chard | Apr 2 | Apr 23 | May 7 | Jul 2 – Aug 20 | 50–60 |
| Chickpeas | Apr 2 | Apr 23 | May 7 | Jul 30 – Sep 10 | 80–110 |
| Chicory | Apr 2 | Apr 23 | May 7 | Jul 9 – Aug 20 | 60–85 |
| Chinese Cabbage | Apr 2 | Apr 23 | May 7 | Jul 2 – Jul 30 | 50–70 |
| Christmas Lima Beans | Mar 12 | May 14 | May 21 | Aug 13 – Sep 17 | 80–100 |
| Collard Greens | Apr 2 | Apr 23 | May 7 | Jul 2 – Sep 3 | 55–75 |
| Corn | — | May 14 | — | Jul 16 – Sep 10 | 60–100 |
| Cowpeas | — | May 14 | — | Jul 16 – Aug 27 | 60–90 |
| Cress | Apr 2 | Apr 23 | May 7 | May 21 – Jun 11 | 14–21 |
| Crookneck Squash | Apr 2 | May 14 | May 21 | Jul 9 – Aug 6 | 45–60 |
| Crosne | — | Apr 23 | — | Sep 24 – Oct 8 | 150–200 |
| Cucumber | Apr 2 | May 14 | May 21 | Jul 16 – Sep 10 | 50–70 |
| Daikon | — | Apr 23 | — | Jun 18 – Jul 16 | 50–70 |
| Delicata Squash | Apr 2 | May 14 | May 21 | Aug 13 – Sep 17 | 80–100 |
| Edamame | — | May 14 | — | Jul 30 – Sep 10 | 75–100 |
| Eggplant | Feb 26 | May 14 | May 21 | Jul 30 – Oct 1 | 65–85 |
| Endive | Apr 2 | Apr 23 | May 7 | Jun 25 – Jul 30 | 45–65 |
| Escarole | Apr 2 | Apr 23 | May 7 | Jul 2 – Jul 30 | 50–70 |
| Fava Beans | Apr 2 | Apr 23 | May 7 | Jul 23 – Sep 3 | 75–100 |
| Fennel | Mar 12 | May 14 | May 21 | Jul 23 – Sep 3 | 60–90 |
| Garlic | — | — | — | — | 90–240 |
| Green Beans | — | May 14 | — | Jul 9 – Sep 3 | 50–65 |
| Horseradish | — | — | May 21 | Sep 24 – Nov 5 | 120–180 |
| Hot Peppers | Feb 26 | May 14 | May 21 | Jul 30 – Nov 5 | 70–120 |
| Hubbard Squash | Apr 2 | May 14 | May 21 | Sep 3 – Oct 8 | 100–120 |
| Kabocha | Apr 2 | May 14 | May 21 | Aug 20 – Sep 17 | 85–100 |
| Kai Lan | Apr 2 | Apr 23 | May 7 | Jun 25 – Jul 23 | 45–60 |
| Kale | Apr 2 | Apr 23 | May 7 | Jul 2 – Aug 27 | 50–70 |
| Kidney Beans | — | May 14 | — | Aug 13 – Sep 17 | 85–110 |
| Kohlrabi | Apr 2 | Apr 23 | May 7 | Jun 25 – Jul 30 | 45–65 |
| Komatsuna | Apr 2 | Apr 23 | May 7 | Jun 11 – Jul 16 | 35–50 |
| Leeks | Apr 2 | Apr 23 | May 7 | Aug 6 – Oct 22 | 90–150 |
| Lentils | Apr 2 | Apr 23 | May 7 | Jul 30 – Sep 10 | 80–110 |
| Lettuce | Apr 2 | Apr 23 | May 7 | Jun 11 – Aug 20 | 30–60 |
| Lima Beans | — | May 14 | — | Jul 16 – Aug 27 | 60–90 |
| Mache | Apr 2 | Apr 23 | May 7 | Jun 18 – Jul 23 | 40–60 |
| Melon | Apr 2 | May 14 | May 21 | Jul 30 – Sep 17 | 70–100 |
| Microgreens | Apr 2 | Apr 23 | May 7 | May 14 – Jun 11 | 7–21 |
| Mitsuba | Apr 2 | Apr 23 | Apr 30 | Jun 25 – Aug 20 | 50–70 |
| Mizuna | Apr 2 | Apr 23 | May 7 | Jun 11 – Jul 9 | 30–45 |
| Mustard Greens | Apr 2 | Apr 23 | May 7 | Jun 11 – Aug 13 | 30–50 |
| Napa Cabbage | Apr 2 | Apr 23 | May 7 | Jul 2 – Aug 6 | 55–75 |
| New Zealand Spinach | Mar 12 | May 14 | May 21 | Jul 16 – Aug 13 | 55–70 |
| Okra | Mar 12 | May 14 | May 21 | Jul 16 – Sep 10 | 50–65 |
| Onion | Apr 2 | Apr 23 | May 7 | Aug 6 – Sep 24 | 90–120 |
| Pac Choi | Apr 2 | Apr 23 | May 7 | Jun 18 – Jul 16 | 40–55 |
| Parsnip | — | Apr 23 | — | Aug 6 – Sep 17 | 100–130 |
| Patty Pan Squash | Apr 2 | May 14 | May 21 | Jul 9 – Aug 6 | 45–60 |
| Peas | Apr 2 | Apr 23 | May 7 | Jul 2 – Aug 27 | 55–70 |
| Peppers | Feb 26 | May 14 | May 21 | Jul 23 – Oct 1 | 60–90 |
| Pole Beans | Mar 12 | May 14 | May 21 | Jul 16 – Sep 10 | 55–70 |
| Potatoes | Mar 12 | May 14 | May 21 | Jul 30 – Oct 8 | 70–120 |
| Pumpkin | Apr 2 | May 14 | May 21 | Aug 20 – Oct 8 | 85–120 |
| Purslane | Apr 2 | Apr 23 | May 7 | Jun 18 – Jul 23 | 40–60 |
| Radicchio | Apr 2 | Apr 23 | May 7 | Jul 9 – Aug 13 | 60–80 |
| Radish | — | Apr 23 | — | May 21 – Jun 11 | 22–35 |
| Rhubarb | — | — | May 28 | — | 365–730 |
| Romanesco | Apr 2 | Apr 23 | May 7 | Jul 23 – Sep 3 | 75–100 |
| Rutabaga | — | Apr 23 | — | Jul 16 – Aug 20 | 80–100 |
| Salsify | — | Apr 23 | — | Aug 6 – Sep 17 | 100–130 |
| Savoy Cabbage | Apr 2 | Apr 23 | May 7 | Jul 16 – Sep 10 | 70–110 |
| Scallions | Apr 2 | Apr 23 | May 7 | Jul 2 – Jul 30 | 50–70 |
| Scarlet Runner Beans | Mar 12 | May 14 | May 21 | Jul 23 – Aug 27 | 60–80 |
| Shallot | Apr 2 | Apr 23 | May 7 | Aug 6 – Sep 24 | 90–120 |
| Shiso | Mar 19 | May 14 | May 21 | Jul 16 – Sep 10 | 50–70 |
| Snap Peas | Mar 12 | May 14 | May 21 | Jul 16 – Sep 10 | 55–70 |
| Snow Peas | Apr 2 | Apr 23 | May 7 | Jul 2 – Aug 27 | 50–65 |
| Soybeans | — | May 14 | — | Aug 6 – Oct 1 | 80–120 |
| Spaghetti Squash | Apr 2 | May 14 | May 21 | Aug 20 – Sep 17 | 85–100 |
| Spinach | Apr 2 | Apr 23 | May 7 | Jun 11 – Aug 13 | 35–50 |
| Squash (Summer) | Apr 2 | May 14 | May 21 | Jul 9 – Sep 10 | 45–65 |
| Squash (Winter) | Apr 2 | May 14 | May 21 | Aug 13 – Oct 8 | 80–120 |
| Sunchoke | — | — | May 21 | Sep 10 – Nov 5 | 110–150 |
| Sunflower | Mar 12 | May 14 | May 21 | Jul 30 – Sep 17 | 70–100 |
| Sweet Corn | — | May 14 | — | Jul 16 – Aug 27 | 60–90 |
| Sweet Potatoes | Mar 12 | May 14 | May 21 | Aug 20 – Oct 8 | 90–120 |
| Tatsoi | Apr 2 | Apr 23 | May 7 | Jun 11 – Jul 16 | 35–50 |
| Tomatillo | Mar 12 | May 14 | May 21 | Jul 23 – Oct 1 | 60–85 |
| Tomatoes | Mar 12 | May 14 | May 21 | Jul 23 – Oct 1 | 60–85 |
| Turnip | — | Apr 23 | — | Jun 4 – Jul 9 | 40–60 |
| Watercress | Apr 2 | Apr 23 | May 7 | Jun 18 – Jul 23 | 40–60 |
| Watermelon | Apr 2 | May 14 | May 21 | Jul 30 – Sep 17 | 70–100 |
| Wax Beans | — | May 14 | — | Jul 9 – Sep 3 | 50–65 |
| Winter Melon | Mar 12 | May 14 | May 21 | Aug 20 – Oct 8 | 90–120 |
| Yard Long Beans | Mar 12 | May 14 | May 21 | Jul 16 – Aug 27 | 55–80 |
| Zucchini | Apr 2 | May 14 | May 21 | Jul 9 – Sep 3 | 45–60 |
🍓 Fruits to Grow in Calgary
27 fruits that grow well in Zone 5a with planting dates for Calgary.
Show all 27 fruits with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Harvest | Days to Maturity |
|---|---|---|---|---|---|
| Alpine Strawberries | — | — | May 28 | Aug 27 – Nov 12 | 90–180 |
| Aronia | — | — | May 28 | — | 730–1095 |
| Blackberries | — | — | May 28 | — | 365–730 |
| Blueberries | — | — | May 28 | — | 730–1095 |
| Boysenberries | — | — | May 28 | — | 365–730 |
| Cantaloupe | — | — | May 28 | Aug 6 – Sep 10 | 70–90 |
| Che Fruit | — | — | May 28 | — | 1095–1825 |
| Cranberries | — | — | May 28 | — | 730–1095 |
| Currants | — | — | May 28 | — | 730–1095 |
| Elderberries | — | — | May 28 | — | 730–1095 |
| Goji Berries | — | — | May 28 | — | 730–1095 |
| Gooseberries | — | — | May 28 | — | 730–1095 |
| Grapes | — | — | May 28 | — | 730–1095 |
| Ground Cherry | — | — | May 28 | Aug 6 – Oct 1 | 65–80 |
| Hardy Kiwi | — | — | May 28 | — | 1095–1825 |
| Haskaps | — | — | May 28 | — | 730–1095 |
| Honeydew | — | — | May 28 | Aug 20 – Oct 1 | 80–110 |
| Jostaberry | — | — | May 28 | — | 730–1095 |
| Lingonberries | — | — | May 28 | — | 730–1095 |
| Medlar | — | — | May 28 | — | 1095–1825 |
| Mulberries | — | — | May 28 | — | 730–1825 |
| Pawpaw | — | — | May 28 | — | 1095–2555 |
| Persimmon | — | — | May 28 | — | 1095–2555 |
| Quince | — | — | May 28 | — | 1095–1825 |
| Raspberries | — | — | May 28 | — | 365–730 |
| Serviceberries | — | — | May 28 | — | 730–1095 |
| Strawberries | — | — | May 28 | Aug 27 – Nov 12 | 90–365 |
🌿 Herbs to Grow in Calgary
37 herbs that grow well in Zone 5a with planting dates for Calgary.
Show all 37 herbs with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Harvest | Days to Maturity |
|---|---|---|---|---|---|
| Angelica | Apr 2 | Apr 23 | Apr 30 | — | 365–730 |
| Anise | Apr 2 | Apr 23 | Apr 30 | Jul 30 – Oct 15 | 90–120 |
| Basil | Mar 19 | May 14 | May 21 | Jul 16 – Sep 17 | 50–75 |
| Bee Balm | — | — | May 14 | Aug 13 – Oct 29 | 90–120 |
| Borage | Apr 2 | Apr 23 | Apr 30 | Jun 25 – Aug 13 | 50–60 |
| Caraway | Apr 2 | Apr 23 | Apr 30 | — | 365–450 |
| Catnip | — | — | May 14 | Jul 16 – Sep 17 | 60–80 |
| Chamomile | Apr 2 | Apr 23 | Apr 30 | Jul 2 – Sep 10 | 60–90 |
| Chervil | Apr 2 | Apr 23 | Apr 30 | Jun 11 – Aug 13 | 40–60 |
| Chives | — | — | May 14 | Jul 16 – Sep 24 | 60–90 |
| Cilantro | Apr 2 | Apr 23 | Apr 30 | Jun 11 – Aug 13 | 40–60 |
| Comfrey | — | — | May 14 | Jul 16 – Sep 24 | 60–90 |
| Cumin | Apr 2 | Apr 23 | Apr 30 | Aug 13 – Oct 15 | 100–120 |
| Dill | Apr 2 | Apr 23 | Apr 30 | Jun 11 – Aug 13 | 40–60 |
| Echinacea | — | — | May 14 | Sep 17 – Oct 29 | 120–180 |
| Epazote | Mar 19 | May 14 | May 21 | Jul 9 – Sep 3 | 45–60 |
| Fennel (herb) | Apr 2 | Apr 23 | Apr 30 | Jul 2 – Sep 10 | 60–90 |
| Feverfew | — | — | May 14 | Aug 13 – Oct 29 | 90–120 |
| Garlic Chives | — | — | May 14 | Jul 16 – Sep 24 | 60–90 |
| Horehound | — | — | May 14 | Jul 30 – Sep 24 | 75–90 |
| Hyssop | — | — | May 14 | Jul 23 – Sep 24 | 70–90 |
| Lavender | — | — | May 14 | Aug 13 – Oct 29 | 90–200 |
| Lemon Balm | — | — | May 14 | Jul 16 – Sep 3 | 60–70 |
| Lemon Thyme | — | — | May 14 | Jul 23 – Sep 24 | 70–90 |
| Lovage | — | — | May 14 | Jul 23 – Sep 24 | 70–90 |
| Mint | — | — | May 14 | Jul 16 – Sep 24 | 60–90 |
| Oregano | — | — | May 14 | Jul 16 – Sep 24 | 60–90 |
| Parsley | Apr 2 | Apr 23 | Apr 30 | Jul 2 – Sep 3 | 60–80 |
| Rue | — | — | May 14 | Jul 23 – Sep 24 | 70–90 |
| Sage | — | — | May 14 | Jul 30 – Sep 24 | 75–90 |
| Savory | — | — | May 14 | Jul 9 – Sep 3 | 50–70 |
| Sorrel | Apr 2 | Apr 23 | Apr 30 | Jun 11 – Aug 13 | 40–60 |
| Tarragon | — | — | May 14 | Jul 16 – Sep 24 | 60–90 |
| Thai Basil | Mar 19 | May 14 | May 21 | Jul 16 – Sep 17 | 50–75 |
| Thyme | — | — | May 14 | Jul 23 – Sep 24 | 70–90 |
| Valerian | — | — | May 14 | Sep 17 – Oct 29 | 120–180 |
| Yarrow | — | — | May 14 | Aug 13 – Oct 29 | 90–120 |
Monthly Planting Guide for Calgary
Gardening Guides & Resources
Helpful guides from The Ultimate Homestead to improve your garden in Calgary.
Frequently Asked Questions
What planting zone is Calgary, AB?
Calgary is in USDA Hardiness Zone 5a. This zone classification determines which perennial plants survive winter and sets the baseline for frost timing across the county.
When is the last frost in Calgary, AB?
Based on 30 years of NOAA weather station data, the median last spring frost in Calgary falls around May 7. Plan transplants and direct-sow dates relative to this date.
When is the first fall frost in Calgary, AB?
The median first fall frost in Calgary arrives around October 14. Harvest or protect frost-sensitive crops — tomatoes, peppers, basil, squash — before this date.
Is Calgary a good location for home gardening?
Calgary scores 85/100 (Excellent) on our Microclimate Index, which combines frost reliability, drought pressure, soil challenge, elevation risk, and long-term climate trend. This is an above-average location for home gardening with relatively predictable growing conditions.
Plan Your Garden with Confidence
Get our free Garden Planner — designed to help Calgary gardeners in Zone 5a organize planting dates, track what's growing, and never miss a planting window.
Get Your Free Garden Planner →Free download. Plan your entire garden season in minutes.
