When to plant tomatoes in Hagerstown: 28 April – 22 July

In Hagerstown, tomato: sow for seedlings from 14 February to 31 May; plant into a greenhouse from 7 April to 22 July; plant out into open ground from 28 April to 22 July.

Tomato in Hagerstown: soil, season and weather

In Hagerstown the soil, not frost, sets the date: the last frost is over around 4 April, but the top 7 cm of soil reaches 15 °C — the minimum on the tomato card — only around 28 April, 24 days later.

Last spring frost	4 April
Top 7 cm of soil at 15 °C	28 April, 24 days after the last frost
Into an unheated greenhouse	7 April – 22 July; April outside: 6.7 °C at night, 18.6 °C by day; card 16–27 °C
First autumn frost	11 November, 197 days after the start
Days in the bed to the first harvest (card)	70
First harvest, if planted in this window	7 July – 30 September
Days left for picking	127
Daylight	11:33 on 7 March, 13:45 on 28 April
Watering outdoors when fruiting (card)	every 3 days; the driest month, November, has 7 rainy days

Tomato in Hagerstown: care after planting

Planted on 28 April: in the first weeks water every 4 days.

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

28 April — feed: balanced (NPK)
26 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 Hagerstown during the tomato season

Days average above the tomato card's 16–27 °C in June (28.6 °C), July (31.8 °C) and August (29.7 °C). Months that stay below 16 °C even by day on average: November (12.7 °C). Nights average below 16 °C in April, May and October, November (3.4–12 °C).

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
April	18.6	6.7	87	10	13:14
May	23	12	115	14	14:20
June	28.6	17	96	13	14:57
July	31.8	20.4	111	13	14:43
August	29.7	19.2	86	11	13:45
September	26.2	16	105	10	12:30
October	20.1	10	76	9	11:13
November	12.7	3.4	66	7	10:01

ERA5 2016–2025, Open-Meteo

Tomato in nearby cities

Around Hagerstown, Washington, D.C. is 13 days earlier and Pittsburgh 9 days later.

City	Distance	Date	Difference
Washington, D.C.	99 km	15 April – 27 July	13 days earlier
Harrisburg	103 km	3 May – 22 July	5 days later
Baltimore	104 km	16 April – 2 August	12 days earlier
Annapolis	129 km	20 April – 30 July	8 days earlier
Dover	198 km	17 April – 6 August	11 days earlier
Pittsburgh	213 km	7 May – 20 July	9 days later

Where to buy tomato plants and seeds near Hagerstown

Buy plants ready to set out from 28 April to 22 July (from 7 April to 22 July for an unheated greenhouse); seed for raising your own is sown from 14 February to 31 May. Within 15 km of Hagerstown OpenStreetMap lists 1 garden centre, 2 markets and 2 farm shops (collected 28 October 2026).

Pennsylvania Dutch Market — market
Potomac Avenue 1583, 21742 Hagerstown · 6 km
Lovell's — garden centre
8 km
S&K Mercadito Latino — market
3 km
Lewis' Orchards — farm shop
13 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