When to plant watermelons in Augusta: 22 June – 25 July

In Augusta, watermelon: sow for seedlings from 4 May to 27 June; plant into a greenhouse from 1 June to 25 July; plant out into open ground from 22 June to 25 July. For plants and seeds, the places nearby include Longfellow's Greenhouses (garden centre, 7 km); addresses and opening hours are below.

Watermelon in Augusta: soil, season and weather

In Augusta the soil, not frost, sets the date: the last frost is over around 23 April, but the top 7 cm of soil reaches 18 °C — the minimum on the watermelon card — only around 22 June, 60 days later.

Last spring frost	23 April
Top 7 cm of soil at 18 °C	22 June, 60 days after the last frost
Into an unheated greenhouse	1 June – 25 July; June outside: 13.5 °C at night, 23.7 °C by day; card 18–35 °C
First autumn frost	3 November, 134 days after the start
Days in the bed to the first harvest (card)	59
First harvest, if planted in this window	20 August – 22 September
Days left for picking	75
Daylight	15:06 on 25 May, 15:32 on 22 June
Watering outdoors when fruiting (card)	every 5 days; the driest month, September, has 9 rainy days

The same dates in Augusta hold for Cucumber, Bell Pepper, Eggplant, Zucchini and Pumpkin.

Watermelon in Augusta: care after planting

Planted on 22 June: in the first weeks water every 5 days.

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

22 June — feed: balanced (NPK)

Pests and diseases of watermelon 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 Augusta during the watermelon season

No month of the season averages above the watermelon card's 18–35 °C by day; the warmest, July, averages 27.3 °C. Months that stay below 18 °C even by day on average: October (15.5 °C) and November (7.7 °C). Nights average below 18 °C in every month of the season, from 0.1 °C to 17.6 °C.

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
June	23.7	13.5	98	12	15:30
July	27.3	17.6	88	11	15:13
August	26.2	16.8	97	11	14:04
September	22.2	13.2	82	9	12:34
October	15.5	7.4	125	10	11:03
November	7.7	0.1	90	10	9:38

ERA5 2016–2025, Open-Meteo

Watermelon in nearby cities

Around Augusta, Manchester (United States) is 23 days earlier and Bangor 3 days later.

City	Distance	Date	Difference
Portland, Maine	82 km	20 June – 26 July	2 days earlier
Bangor	101 km	25 June – 25 July	3 days later
Concord	187 km	1 June – 22 July	21 days earlier
Manchester (United States)	200 km	30 May – 24 July	23 days earlier
Sherbrooke	206 km	18 June – 18 July	4 days earlier
Montpelier	221 km	20 June – 8 July	2 days earlier

Where to buy watermelon plants and seeds near Augusta

Buy plants ready to set out from 22 June to 25 July (from 1 June to 25 July for an unheated greenhouse); seed for raising your own is sown from 4 May to 27 June. Within 15 km of Augusta OpenStreetMap lists 2 garden centres and 3 markets (collected 28 October 2026).

Walmart Garden Center — garden centre
4 km · walmart.com
Longfellow's Greenhouses — garden centre
Puddledock Road 81, 04351 Manchester · Mon–Sun 08:00–17:00 · 7 km
Hallowell Seafood and Produce — market
Water Street 197, 04347 Hallowell · Mon–Sun 08:00–18:00 · 3 km · hallowellseafoodandproduce.com
Emery's Meat and Produce — market
Bridge Street 35, 04345 Gardiner · 9 km · emerysmeatandproduce.com

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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