When to plant watermelons in Huntsville: 4 May – 5 August

In Huntsville, watermelon: sow for seedlings from 16 March to 8 July; plant into a greenhouse from 13 April to 5 August; plant out into open ground from 4 May to 5 August. For plants and seeds, the places nearby include Indian Creek Wholesale Nursery (plant nursery, 14 km); addresses and opening hours are below.

Watermelon in Huntsville: soil, season and weather

In Huntsville the soil, not frost, sets the date: the last frost is over around 20 March, but the top 7 cm of soil reaches 18 °C — the minimum on the watermelon card — only around 4 May, 45 days later.

Last spring frost	20 March
Top 7 cm of soil at 18 °C	4 May, 45 days after the last frost
Into an unheated greenhouse	13 April – 5 August; April outside: 9.4 °C at night, 20.6 °C by day; card 18–35 °C
First autumn frost	14 November, 194 days after the start
Days in the bed to the first harvest (card)	59
First harvest, if planted in this window	2 July – 3 October
Days left for picking	135
Daylight	12:43 on 6 April, 13:39 on 4 May
Watering outdoors when fruiting (card)	every 5 days; the driest month, October, has 7 rainy days

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

Watermelon in Huntsville: care after planting

Planted on 4 May: in the first weeks water every 5 days.

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

4 May — 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 Huntsville during the watermelon season

No month of the season averages above the watermelon card's 18–35 °C by day; the warmest, July, averages 30.6 °C. Months that stay below 18 °C even by day on average: November (15.9 °C). Nights average below 18 °C in May and September–November (5.8–17.6 °C).

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
May	25.3	14.6	122	13	13:58
June	29.1	18.6	108	14	14:28
July	30.6	20.8	113	16	14:16
August	29.9	20.1	116	15	13:29
September	27.8	17.6	83	9	12:26
October	22.5	11.9	82	7	11:21
November	15.9	5.8	84	8	10:22

ERA5 2016–2025, Open-Meteo

Watermelon in nearby cities

1 of the nearest cities share Huntsville's date.

City	Distance	Date	Difference
Chattanooga	127 km	27 April – 3 August	7 days earlier
Birmingham (United States)	132 km	9 April – 17 August	25 days earlier
Nashville	165 km	3 May – 5 August	1 day earlier
Atlanta	225 km	13 April – 13 August	21 days earlier
Bowling Green	255 km	4 May – 1 August	same day
Montgomery	259 km	17 March – 20 August	48 days earlier

Where to buy watermelon plants and seeds near Huntsville

Buy plants ready to set out from 4 May to 5 August (from 13 April to 5 August for an unheated greenhouse); seed for raising your own is sown from 16 March to 8 July. Within 15 km of Huntsville OpenStreetMap lists 1 garden centre, 1 plant nursery and 1 market (collected 28 October 2026).

Indian Creek Wholesale Nursery — plant nursery
Slaughter Road 1124, 35758 Madison · Sun closed; Mon–Fri 07:00–17:00; Sat 08:00–17:00 · 14 km · indiancreeknurseryal.com
The Home Depot — garden centre
7 km
Oakwood Farms Market — market
11 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