In 2019 two plot holders on our site Wally and John grew water melons out on the allotment and not under glass. Looking at the RHS Web site re Melons it states that there are three groups of sweet melons. Canteloupe melons, with their orange flesh are the best ones for us to grow in the UK. You can also grow honeydew types, which have firm yellow flesh, and musk melons, which must be grown in a greenhouse.
For best results in our cooler climate grow your melons in a greenhouse or coldframe, or against a sunny sheltered wall with a cloche covering them.
Now I’m not sure how a wall can be sunny and sheltered at the same time.
I’m going to have a go at growing Melons in 2020 and have bought a couple of packs of seeds
WATER MELON AMARILLO ORO
Melon Amarillo Oro produces a yellow skinned cantaloupe melon with superb sweet juicy refreshing flesh. Each of these delicious fruits weighs up to 5- 6 Ib (2 - 3 kg). Open pollinated. A pre-1870 heirloom variety from Spain.
Melons require high temperatures and humidity. In all but the very warmest areas cultivation is most successful in a greenhouse, or under cover of a cold frame.
Direct sow: February - April
Harvest: 100 days
Sun: Full sun
Temperature: 23 - 30 C
Depth: 1 inch (2.5 cm)
Plant spacing: 36 inches (90cm)
WATER MELON SUGAR BABY
Sweet tasting and smaller fruited "Ice Box" type watermelon. Early and very productive with sweet, juicy, fine-textured, medium-red flesh and thin hard rind.
The round, 8 to 12 lb, dark green skinned melons grow 8 inches across. Ideal variety if space is limited, as this can be trailed on trellises and faster to ripen in short summers.
Ready to harvest about 75 days after seeding in favourable conditions. Can be grown outside in a warm, sheltered and sunny location, but for the most reliable crops under glass is best.
Days to Germination: 5-7
Days To Harvest: 75 in warm conditions
Planting Depth:12 – 25mm 1/2 to 1 inch
Spacing: 600mm 2 feet
Light: Sunny, Warm, Sheltered Location
· Prepare soil by digging and incorporating liberal amounts of well-rotted compost or farmyard manure over-winter. Watermelons thrive in a sunny, warm location
· Sow April to May 1cm (½in) deep, in 7cm (3.5in) pots of free-draining seed sowing mix. Place in a (propagator, airing cupboard) and keep at a temperature of around 20-25C (68-77F) until after germination, usually 5-7 days.
· When first true leaves develop, transplant into 13cm (5in) pots for a few weeks.
· Plant out 24 inches apart after carefully hardening off after all risk of frost in a warm sheltered position in full sun or for a more reliable crop under glass.
· Water regularly and feed with liquid fertilizer every 14 days.
· Pinch out growing point at the 4 leaf stage and train the laterals (side-shoots) along the row. Hand pollinate if required.
· At harvest time, tap the watermelon with your knuckles, and if it sounds hollow, it's ripe.