Domakihub How to Grow Watermelon and Harvest Sweet, Juicy Fruit
Everything you need to know, from choosing the right variety to knowing when to pick.
Reviewed by Domakihub garden pros · 2026-06-23 · 5 min read
Greece's long, hot summers and bright sunshine make it one of the best climates in the world for growing watermelon — whether you have a garden behind a holiday villa, a hotel courtyard, or a suburban backyard. The video above walks through the full visual process; this guide breaks it into clear, actionable steps so you can get from seed to sweet fruit by midsummer. With the right variety, decent soil, and a few smart watering habits, even a first-time grower can pull off a rewarding harvest.
Why Watermelons Thrive in the Greek Climate
Watermelons are a warm-season crop that demand heat, sunshine, and a long frost-free window — all of which Greece delivers in abundance. The Greek growing season typically allows direct sowing from late April on the mainland (once soil temperatures reach 21–24°C), giving plants a full four to five months before the first autumn cool.
Holiday properties and hotels with irrigated outdoor areas benefit especially well: the ornamental sprawl of watermelon vines can double as ground cover between olive trees or along a sunny wall, while producing fruit that impresses guests and reduces catering costs.
Choosing the Right Variety
For Greek gardens, compact or 'icebox' varieties such as Sugar Baby and Crimson Sweet are popular because they mature in 75–80 days and fit smaller plots. Larger heirloom types like Charleston Grey or Jubilee suit bigger properties with room for vines to run several metres. Seedless varieties are available but require a pollinator plant nearby, so for simplicity most home growers stick with seeded types.
Local nurseries in Greece often stock regionally adapted varieties already proven in Mediterranean heat. When buying seeds online, look for varieties with a confirmed DTM (days to maturity) under 85 to ensure harvest well before September.
5 Steps to Growing Watermelon Successfully
- 1
Prepare the soil and choose your spot
Watermelons need full sun (at least 8 hours a day) and well-draining, sandy-loam soil with a pH of 6.0–6.8. Work in a generous layer of aged compost or well-rotted manure to a depth of 30 cm before planting. Create low mounded hills or raised rows about 30 cm high to improve drainage and warm the root zone faster — critical in heavier soils found in parts of northern Greece.
- 2
Sow seeds or transplant seedlings
Sow seeds 2–3 cm deep directly in the garden once soil is reliably above 21°C, placing 3–4 seeds per mound and thinning to the two strongest plants. If you want an earlier start, sow indoors in biodegradable pots 3–4 weeks before the last frost date and transplant carefully — watermelon roots dislike disturbance. Space mounds at least 180 cm apart in every direction to give vines room to run.
- 3
Water deeply and consistently
Watermelons are roughly 92% water, so consistent moisture is non-negotiable early in the season. Water deeply once or twice a week, aiming for 2.5 cm of water at the root zone rather than light daily sprinkles. Switch to a drip-irrigation line or soaker hose to keep foliage dry and reduce fungal risk. Once fruits have reached full size and are approaching ripeness, reduce watering to concentrate sugars — this single step makes the biggest difference to flavour.
- 4
Feed and train the vines
Apply a balanced fertiliser (e.g. 10-10-10) at planting, then switch to a low-nitrogen, higher-potassium feed once flowering begins to encourage fruit set rather than excessive leaf growth. Pinch back the growing tip of each vine after 2–3 fruit have set so the plant channels energy into those melons. If space is tight, train vines in one direction along a fence or wall, or use a sturdy trellis with mesh slings to support the developing fruit.
- 5
Check for ripeness and harvest at the right time
The three classic ripeness checks: the tendril nearest the fruit stem turns brown and dry; the belly spot (where the melon rests on the ground) shifts from white to creamy yellow; and rapping the melon produces a hollow thud rather than a high-pitched ping. Most varieties are ready 70–90 days after transplanting. Cut the stem cleanly with a knife rather than twisting, and store harvested melons in a cool, shaded place — they keep well for 2–3 weeks without refrigeration.
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FAQ
- Can I grow watermelon in a pot or on a balcony in Greece?
- Yes, but choose a compact 'icebox' variety like Sugar Baby and use a pot of at least 40–50 litres with excellent drainage. Balconies in south-facing positions provide enough sun, but container plants dry out faster — check soil moisture daily in summer and water more frequently than in-ground plants. Support the developing fruit in a mesh hammock tied to a trellis or railing.
- Why are my watermelon flowers dropping without setting fruit?
- Watermelons produce separate male and female flowers; the first flush is almost always male and will drop naturally — this is normal. Female flowers have a tiny immature fruit at their base. If female flowers drop without setting, the cause is usually insufficient pollinator activity, excessive nitrogen, or nighttime temperatures below 15°C. Encourage bees by planting flowers nearby, or hand-pollinate by transferring pollen from a male to a female flower with a soft brush.
- How much space does a watermelon plant actually need?
- A single standard watermelon plant needs roughly 2–3 square metres of ground space as vines can reach 3 metres or longer. For compact varieties, 1.5 square metres is workable. If your garden is small, run vines up a sturdy vertical trellis — this cuts the ground footprint significantly and makes it easier to monitor fruit development. Hotels and larger properties can plant multiple mounds along a sunny perimeter fence with minimal maintenance.