Cantaloupe
Cucumis melo
Also known asMuskmelon · Rockmelon · Sweet melon · Spanspek · Melón
Environment
The bounded range this crop tolerates. Strict on light; outside the DLI band, yields drop sharply.
Climate and zones
- USDA zones
- 4–12 (winter low around -34°C)
- Frost
- frost sensitive (dies at first frost)
- Season
- warm (summer, frost-sensitive)
Growing systems
Root mass: heavy. Thin-channel systems can't hold this crop.
Growing media
| Medium | pH effect | Retention | Bacterial surface |
|---|---|---|---|
| Coco coir (Coconut coir) | slightly acidic | high | moderate |
| Perlite (Expanded volcanic glass) | neutral / inert | very low | low |
| Rockwool (Mineral wool) | alkaline until pre-soaked | very high | low |
| Soil-based mix (Potting soil) | varies | high | high |
Nutrient demand by stage
NPK ratios are relative weights. EC targets shift through the plant's life.
| Stage | N | P | K | EC (mS/cm) |
|---|---|---|---|---|
| seedling | 2 | 1 | 1 | 1.4 |
| vegetative | 3 | 1 | 2 | 2 |
| flowering | 1 | 2 | 3 | 2.2 |
| fruiting | 1 | 2 | 3 | 2.4 |
Companion-growing notes
- Heavy uptake of potassium, nitrogen. Co-grown crops with the same demand will end up deficient even at "correct" EC.
- Very high transpiration. Reservoir drops fast; expect daily top-ups and EC creep.
Aquaponics suitability
Compatible
Fish waste provides enough nitrogen for healthy growth. Supplemental potassium, calcium, and iron may still be needed depending on fish stocking density.
Care notes
A challenging but rewarding hydroponic crop for warm greenhouses. Dutch bucket or large container systems (20 L) with strong trellis support for vertical growing. EC 2.0-3.5 mS/cm (increase during fruit development). pH 5.8-6.5. Temperature: 24–32°C daytime, 18–22°C night (warm days and cool nights improve sugar content). Very high light demand (DLI 22-35 mol/m2/day; melons are among the most light-hungry crops). Hand-pollination is required indoors: transfer pollen from male flowers to female flowers using a brush, preferably in the morning. Train vines vertically on trellis; support each developing fruit in a mesh sling or net bag once it reaches softball size. Limit each vine to 2-3 fruits for best size and sweetness. Harvest timing is critical: for netted types, the fruit is ripe when a crack appears around the stem base and the melon 'slips' (separates) from the vine with gentle pressure. The aroma at the blossom end should be fragrant and sweet. Overwatering during the final 1-2 weeks before harvest dilutes sugar; reduce irrigation slightly as melons approach ripeness. Each plant produces 2-4 melons over a season. Powdery mildew is the most common disease; good airflow and resistant varieties help. A luxury crop for hydroponic growers who want vine-ripe melons with flavor that supermarket imports can't match.