When to plant tomatoes in Davenport: 2 May – 10 July

In Davenport, tomato: sow for seedlings from 18 February to 19 May; plant into a greenhouse from 11 April to 10 July; plant out into open ground from 2 May to 10 July. For plants and seeds, the places nearby include Wallaces Garden Center (garden centre, 3 km); addresses and opening hours are below.

Tomato in Davenport: soil, season and weather

In Davenport the soil, not frost, sets the date: the last frost is over around 20 April, but the top 7 cm of soil reaches 15 °C — the minimum on the tomato card — only around 2 May, 12 days later.

Last spring frost	20 April
Top 7 cm of soil at 15 °C	2 May, 12 days after the last frost
Into an unheated greenhouse	11 April – 10 July; April outside: 5.3 °C at night, 16 °C by day; card 16–27 °C
First autumn frost	30 October, 181 days after the start
Days in the bed to the first harvest (card)	70
First harvest, if planted in this window	11 July – 18 September
Days left for picking	111
Daylight	11:42 on 11 March, 14:02 on 2 May
Watering outdoors when fruiting (card)	every 3 days; the driest month, August, has 9 rainy days

Tomato in Davenport: care after planting

Planted on 2 May: in the first weeks water every 4 days.

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

2 May — feed: balanced (NPK)
30 May — 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 Davenport during the tomato season

Days average above the tomato card's 16–27 °C in June (28.6 °C), July (29.4 °C) and August (28.3 °C). Nights average below 16 °C in May (12 °C) and October (9.2 °C).

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
May	22.6	12	112	12	14:30
June	28.6	18.2	93	11	15:10
July	29.4	20	80	11	14:55
August	28.3	19	77	9	13:53
September	25.8	16.1	77	8	12:31
October	18.2	9.2	88	10	11:09

ERA5 2016–2025, Open-Meteo

Tomato in nearby cities

Around Davenport, Springfield is 6 days earlier and Madison 14 days later.

City	Distance	Date	Difference
Cedar Rapids	100 km	11 May – 5 July	9 days later
Peoria	129 km	2 May – 11 July	same day
Rockford	149 km	13 May – 8 July	11 days later
Madison	195 km	16 May – 7 July	14 days later
Springfield	212 km	26 April – 12 July	6 days earlier
Chicago	249 km	9 May – 17 July	7 days later

Where to buy tomato plants and seeds near Davenport

Buy plants ready to set out from 2 May to 10 July (from 11 April to 10 July for an unheated greenhouse); seed for raising your own is sown from 18 February to 19 May. Within 15 km of Davenport OpenStreetMap lists 2 garden centres and 1 market (collected 28 October 2026).

Wallaces Garden Center — garden centre
Northwest Boulevard 6227 · 3 km · wallacesgardencenter.com
Wallace's Garden Center — garden centre
10 km
Freight House Farmers Market — market
5 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