When to plant pumpkins in Fort Collins: 7 June – 26 June

In Fort Collins, pumpkin: sow for seedlings from 5 April to 15 May; plant into a greenhouse from 17 May to 26 June; plant out into open ground from 7 June to 26 June. For plants and seeds, the places nearby include Rhoads End Farm (farm shop, 9 km); addresses and opening hours are below.

Pumpkin in Fort Collins: soil, season and weather

In Fort Collins the soil, not frost, sets the date: the last frost is over around 25 April, but the top 7 cm of soil reaches 18 °C — the minimum on the pumpkin card — only around 7 June, 43 days later.

Last spring frost	25 April
Top 7 cm of soil at 18 °C	7 June, 43 days after the last frost
First autumn frost	21 October, 136 days after the start
Days in the bed to the first harvest (card)	75
First harvest, if planted in this window	21 August – 9 September
Days left for picking	61
Daylight	13:43 on 26 April, 14:58 on 7 June
Watering outdoors when fruiting (card)	every 5 days; the driest month, October, has 4 rainy days

The same dates in Fort Collins hold for Cucumber, Bell Pepper, Eggplant, Zucchini and Watermelon.

Pumpkin in Fort Collins: care after planting

Planted on 7 June: in the first weeks water every 4 days.

Feeding, by the card’s schedule from that day:

28 June — feed: nitrogen

Pests and diseases of pumpkin to watch for:

Dates count from the first planting day of the window above; a later planting moves them by as many days.

Weather in Fort Collins during the pumpkin season

About 153 mm of rain falls in the season; October is the driest month (20 mm) and June the wettest (40 mm).

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
June	28.4	12.7	40	8	15:03
July	31.6	16.2	37	7	14:48
August	30.5	15.2	34	7	13:49
September	27.7	11.2	22	4	12:30
October	18.8	3.8	20	4	11:11

ERA5 2016–2025, Open-Meteo

Pumpkin in nearby cities

Around Fort Collins, Pueblo is 35 days earlier and Cheyenne 1 day later.

City	Distance	Date	Difference
Cheyenne	69 km	8 June – 18 June	1 day later
Denver	90 km	28 May – 20 June	10 days earlier
Colorado Springs	192 km	6 June – 20 June	1 day earlier
Pueblo	258 km	3 May – 3 July	35 days earlier
Grand Junction	340 km	6 May – 2 July	32 days earlier
Rapid City	420 km	6 June – 17 June	1 day earlier

Where to buy pumpkin plants and seeds near Fort Collins

Buy plants ready to set out from 7 June to 26 June (from 17 May to 26 June for an unheated greenhouse); seed for raising your own is sown from 5 April to 15 May. Within 15 km of Fort Collins OpenStreetMap lists 10 garden centres, 4 farm-supply shops, 2 plant nurseries, 3 markets and 6 farm shops (collected 28 October 2026).

Rhoads End Farm — farm shop
North Overland Trail · 9 km
Mountain Lion Garden Supply — garden centre
10 km
The Perennial Gardner — garden centre
4 km
Laporte Avenue Nursery — plant nursery
6 km

Each window starts on the Greenly calendar date and ends on the last day that still leaves the crop’s days to harvest (from its card) before the average first autumn frost, plus six weeks of picking for crops harvested over weeks (tomatoes, peppers, aubergines, cucumbers, courgettes, pumpkins, watermelons, beans) — our rule; earlier in the window is safer.

Questions