When to plant tomatoes in Colorado Springs: 13 May – 25 June

In Colorado Springs, tomato: sow for seedlings from 1 March to 4 May; plant into a greenhouse from 22 April to 25 June; plant out into open ground from 13 May to 25 June. For plants and seeds, the places nearby include Spencer’s Lawn & Garden Centers (garden centre, 2 km) and Summerland Gardens (garden centre, 3 km); addresses and opening hours are below.

Tomato in Colorado Springs: soil, season and weather

In Colorado Springs the soil, not frost, sets the date: the last frost is over around 3 May, but the top 7 cm of soil reaches 15 °C — the minimum on the tomato card — only around 13 May, 10 days later.

Last spring frost	3 May
Top 7 cm of soil at 15 °C	13 May, 10 days after the last frost
Into an unheated greenhouse	22 April – 25 June; April outside: 0.6 °C at night, 17.6 °C by day; card 16–27 °C
First autumn frost	15 October, 155 days after the start
Days in the bed to the first harvest (card)	70
First harvest, if planted in this window	22 July – 3 September
Days left for picking	85
Daylight	12:12 on 22 March, 14:13 on 13 May
Watering outdoors when fruiting (card)	every 3 days; the driest month, October, has 4 rainy days

Tomato in Colorado Springs: care after planting

Planted on 13 May: in the first weeks water every 4 days.

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

13 May — feed: balanced (NPK)
10 June — feed: nitrogen

Pests and diseases of tomato 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 Colorado Springs during the tomato season

Days average above the tomato card's 16–27 °C in June (28.8 °C), July (30.8 °C) and August (29.5 °C). Nights average below 16 °C in every month of the season, from 3.5 °C to 15.1 °C.

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
May	21.5	5.8	65	11	14:17
June	28.8	12.3	40	7	14:52
July	30.8	15.1	56	9	14:38
August	29.5	14.3	37	7	13:43
September	27	10.9	25	4	12:29
October	19.3	3.5	20	4	11:14

ERA5 2016–2025, Open-Meteo

Tomato in nearby cities

Around Colorado Springs, Grand Junction is 18 days earlier and Cheyenne 12 days later.

City	Distance	Date	Difference
Pueblo	66 km	28 April – 8 July	15 days earlier
Denver	102 km	8 May – 25 June	5 days earlier
Fort Collins	192 km	14 May – 1 July	1 day later
Cheyenne	257 km	25 May – 23 June	12 days later
Grand Junction	326 km	25 April – 7 July	18 days earlier
Santa Fe (United States)	363 km	27 April – 6 July	16 days earlier

Where to buy tomato plants and seeds near Colorado Springs

Buy plants ready to set out from 13 May to 25 June (from 22 April to 25 June for an unheated greenhouse); seed for raising your own is sown from 1 March to 4 May. Within 15 km of Colorado Springs OpenStreetMap lists 16 garden centres, 2 farm-supply shops, 1 plant nursery, 2 markets and 1 farm shop (collected 20 October 2026).

Spencer’s Lawn & Garden Centers — garden centre
East Brookside Street 24, 80906 Colorado Springs · Mon–Sat 09:00–17:00 · 2 km · spencersgardens.com
Summerland Gardens — garden centre
Arcturus Drive 806, 80905 Colorado Springs · Mon–Sat 10:00–17:30, Sun 10:00–16:00 · 3 km · summerlandgardens.com
Roots & Rocks — garden centre
South 21st Street 1014, 80904 Colorado Springs · Mon–Tue 10:00–17:30, Wed–Thu 10:00–14:30, Fri 10:00–13:00 · 4 km · rootsandrocks.com
Rick's Garden Center — garden centre
West Uintah Street 1827, 80904 Colorado Springs · Mon–Sat 09:00–18:00, Sun 10:00–17:00 · 3 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.

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