The catalog · Northwest Montana

What you can grow, and what fits a square.

Each plant is checked against this region's hardiness zone, frost window, and season length. Filter and sort to find your next square.

Hardiness zone5b
SeasonLast frost ~Jun 7 · First frost ~Sep 15 · ~100-day season
🟥 Grows here
Radish
veg
▦ ×16/sq ⏱ 25d
Direct sow late April, then every 2 weeks
🥬 Grows here
Spinach
veg
▦ ×9/sq ⏱ 40d
Direct sow late April; loves the cool
🥗 Grows here
Leaf lettuce
veg
▦ ×4/sq ⏱ 45d
Sow late April, succession through summer
🟣 Grows here
Turnip
veg
▦ ×9/sq ⏱ 50d
Direct sow late April
🫐 Grows here
Beet
veg
▦ ×9/sq ⏱ 55d
Direct sow late April
🥬 Grows here
Swiss chard
veg
▦ ×4/sq ⏱ 55d
Sow late April; shrugs off light frost
🫛 Grows here
Bush beans
veg
▦ ×9/sq ⏱ 55d
Direct sow early June once soil warms
🥬 Grows here
Kale
veg
▦ ×1/sq ⏱ 55d
Start indoors or sow; sweeter after frost
🧅 Grows here
Scallion
veg
▦ ×16/sq ⏱ 60d
Sow or set out April
🫛 Grows here
Peas
veg
▦ ×8/sq ⏱ 60d
Direct sow late April on a trellis
🥕 Grows here
Carrot
veg
▦ ×16/sq ⏱ 70d
Direct sow late April–May
🥦 Grows here
Broccoli
veg
▦ ×1/sq ⏱ 70d
Start indoors early–mid April, transplant May
🥬 Grows here
Cabbage
veg
▦ ×1/sq ⏱ 70d
Start indoors early April, transplant May
🥦 Grows here
Cauliflower
veg
▦ ×1/sq ⏱ 75d
Start indoors early April, transplant May
🥔 Grows here
Potato
veg
▦ ×4/sq ⏱ 90d
Plant seed potatoes April–May
🧅 Grows here
Onion
veg
▦ ×9/sq ⏱ 100d
Plant sets April; long but doable
🍅 With care
Tomato
veg
▦ ×1/sq ⏱ 65d
Short-season variety. Start indoors early April, out after Jun 1
🫑 With care
Pepper
veg
▦ ×1/sq ⏱ 70d
Start indoors; cool nights slow it — marginal here
🍓 With care
Strawberry
fruit
▦ ×4/sq ⏱ perennial
Perennial. Zone-4-hardy variety, mulch over winter
🌼 Grows here
Marigold
flower
▦ ×4/sq ⏱ 50d
Sow after frost; deters many pests
🌼 Grows here
Calendula
flower
▦ ×4/sq ⏱ 50d
Sow late spring; pollinators love it
🌺 Grows here
Nasturtium
flower
▦ ×1/sq ⏱ 50d
Sow after frost; trailing aphid trap, edible
💠 Grows here
Borage
flower
▦ ×1/sq ⏱ 55d
Sow after frost; classic strawberry & tomato friend
🌸 Grows here
Zinnia
flower
▦ ×1/sq ⏱ 60d
Start indoors or sow June; pollinator magnet
🌸 Grows here
Cosmos
flower
▦ ×1/sq ⏱ 60d
Sow June; draws beneficial insects
🌽 Not here yet
Sweet corn
veg
▦ ×1/sq ⏱ 75d
Needs a 16-plant block to pollinate — over the plot cap, and tight on season
🍆 Not here yet
Eggplant
veg
▦ ×1/sq ⏱ 80d
Heat-lover — too marginal for cool Montana nights
🍉 Not here yet
Watermelon
fruit
▦ multi-sq ⏱ 85d
Long, warm season — not viable in Zone 5b yet
🎃 Not here yet
Winter squash
veg
▦ multi-sq ⏱ 95d
Long season + sprawls across many squares