When to plant watermelons in Medford: 19 June – 11 July

In Medford, watermelon: sow for seedlings from 1 May to 13 June; plant into a greenhouse from 29 May to 11 July; plant out into open ground from 19 June to 11 July.

Watermelon in Medford: soil, season and weather

In Medford the soil, not frost, sets the date: the last frost is over around 30 April, but the top 7 cm of soil reaches 18 °C — the minimum on the watermelon card — only around 19 June, 50 days later.

Last spring frost	30 April
Top 7 cm of soil at 18 °C	19 June, 50 days after the last frost
Into an unheated greenhouse	29 May – 11 July; May outside: 5.6 °C at night, 20.5 °C by day; card 18–35 °C
First autumn frost	20 October, 123 days after the start
Days in the bed to the first harvest (card)	59
First harvest, if planted in this window	17 August – 8 September
Days left for picking	64
Daylight	14:48 on 22 May, 15:17 on 19 June
Watering outdoors when fruiting (card)	every 5 days; the driest month, July, has 1 rainy day

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

Watermelon in Medford: care after planting

Planted on 19 June: in the first weeks water every 5 days.

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

19 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 Medford during the watermelon season

No month of the season averages above the watermelon card's 18–35 °C by day; the warmest, August, averages 31.2 °C. Nights average below 18 °C in every month of the season, from 4.8 °C to 13.1 °C.

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
June	25.6	9.2	28	4	15:16
July	31.1	12.8	3	1	15:00
August	31.2	13.1	7	2	13:56
September	26.2	9.6	38	5	12:32
October	18.9	4.8	71	8	11:07

ERA5 2016–2025, Open-Meteo

Watermelon in nearby cities

1 of the nearest cities share Medford's date.

City	Distance	Date	Difference
Eugene	190 km	19 June – 20 July	same day
Redding	201 km	28 April – 1 September	52 days earlier
Salem	287 km	6 June – 8 August	13 days earlier
Portland	352 km	17 June – 13 August	2 days earlier
Reno	407 km	29 April – 19 July	51 days earlier
Sacramento	436 km	24 April – 1 September	56 days earlier

Where to buy watermelon plants and seeds near Medford

Buy plants ready to set out from 19 June to 11 July (from 29 May to 11 July for an unheated greenhouse); seed for raising your own is sown from 1 May to 13 June. Within 15 km of Medford OpenStreetMap lists 13 garden centres, 2 farm-supply shops, 3 markets and 10 farm shops (collected 29 October 2026).

Seven oaks — farm shop
6 km
Daisy Creek vineyard — farm shop
7 km
Walker Creek Farm — farm shop
8 km
Lilly and zoes lemonade stand \ farm store — farm shop
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