Lilly Spring Onion Seeds
£2.99 - £4.99
🌱 Giant Watermelon Sweet Crimson ( Organic )
£1.99 - £3.5
Bursting with sweetness and summer vibes, Giant Watermelon ‘Sweet Crimson’ (Organic) grows large, round fruits with deep red flesh, crisp texture, and refreshing flavour—ideal for warm UK gardens, greenhouses, or polytunnels.
Categories:
Seeds
/
Fruit Seeds
/
Organic Seeds
/
PlantPal Seeds
Brand:
Urban Harvest Co
SKU: UH-7891-C1026
Seed Quantity:
Seed Information
- Plant Type Fruit
- Organic Yes
- Growing Difficulty Moderate To Advanced
- Germination Time 7-14 Days
- Harvest Time 85-100 Days
- Best Season To Grow Late Spring to Early Summer (under cover in UK)
- SunLight Needs Full Sun
- Water Requirements High
- Height Of Maturity Vine spread 2–3 metres
- None GMO Yes
- UK Native No
‘Sweet Crimson’ is a classic watermelon variety prized for its size, sweetness, and productivity. With smooth, striped green rinds and juicy crimson-red flesh, this organic variety is perfect for slicing, summer feasts, and healthy snacking.
Best grown in a warm, sheltered position or under cover (greenhouse or tunnel), these watermelons thrive in full sun and fertile soil. They require space to spread and consistent watering as fruits develop. Each plant can yield several large fruits, weighing up to 5–8kg when fully mature.
-
Type: Warm-season annual fruit
-
Fruit Size: Large – up to 5–8kg
-
Flavour: Exceptionally sweet and crisp
-
Sowing Time: April–May indoors (with warmth)
-
Plant Out: Late May–June (after frost risk)
-
Harvest Time: August–September
-
Spacing: 100–120 cm between plants
-
Grows Well In: Greenhouses, polytunnels, warm outdoor beds
-
Certified Organic Seeds
For an impressive, sun-loving crop that’s sure to wow in size and taste, ‘Sweet Crimson’ Watermelon is the organic gardener’s juicy summer star.
🌿 Growing & Care Guide
A Juicy, Summer-Loving Showstopper for Greenhouses and Warm Gardens
‘Sweet Crimson’ is a large, sweet-fleshed watermelon variety that thrives in sunny, sheltered conditions. These organic seeds grow into vigorous vines bearing big, striped fruits with crisp red centres — perfect for summer feasts.
🛒 What You’ll Need:
-
Organic Watermelon ‘Sweet Crimson’ seeds
-
Seed trays or 9cm pots
-
Peat-free compost
-
Greenhouse, polytunnel, or sheltered sunny outdoor space
-
Watering can, mulch, and optional trellis/support
🌿 Growing & Care Instructions
1. Sowing Indoors (Best Apr–May)
-
Sow seeds 1.5–2cm deep in pots or trays.
-
Keep in a heated propagator or warm room (21–25°C).
-
Ensure good light and moist (not soggy) compost.
2. Germination
-
Germinates in 5–10 days.
-
Transplant seedlings once they have 2–3 true leaves.
3. Transplanting
-
Move into large containers or greenhouse beds when 10–15cm tall.
-
If outdoors, harden off and plant after all risk of frost has passed.
-
Space 80–100cm apart. Ensure rich, well-drained soil and full sun.
4. Growing On
-
Water consistently and mulch to retain moisture.
-
Provide support or allow vines to trail.
-
Pinch out tips after 4–5 fruits set to direct energy into ripening.
5. Feeding
-
Feed with organic liquid fertiliser every 2–3 weeks during fruiting.
-
Use high-potassium feed once flowers appear.
6. Harvesting
-
Ready in 70–90 days from sowing.
-
Harvest when the underside turns creamy yellow and the fruit sounds hollow when tapped.
Sun-grown, sweet, and satisfying — grow giant organic watermelons for a slice of summer joy.
Similar Products
Tomato Zlatava Seeds
£2.99 - £4.99
Parsnips Albion F1 Seeds
£2.99 - £4.99
Spring Onion Eiffel Seeds
£2.99 - £4.99
Cabbage Mammoth Red Rock Seeds
£2.99 - £4.99
Cabbage Tundra F1 Seeds
£2.99 - £4.99
