Chilli peppers
Capsicum spp. is well suited to hydroponic self-sufficiency when grown in a drip-irrigated substrate.
Why this crop makes sense
Compact plants are available, and the fruit is particularly suitable for drying. The decisive question is not merely whether the plant grows hydroponically, but whether its edible yield, growing period, light requirements, workload and storage life suit the household.
System and root space
A drip-irrigated substrate is recommended. The root zone must remain evenly moist, well aerated and protected from light. Record the source water and nutrient solution; returns, pipes and reservoirs must remain accessible and easy to clean.
Suitable system pages: Drip irrigation and Dutch buckets
pH, EC and climate
A cautious starting range is pH 5.5–6.5 and EC 1.8–2.8 mS/cm at 20–28 °C. These are not universal target values: cultivar, age, light, source water, temperature, measuring method and development stage may require adjustments.
Sowing and crop management
Heat varies with the cultivar and growing conditions; protect skin and eyes during processing. A small preliminary trial checks germination and system performance. Space plants approximately 30–45 cm apart and regularly inspect root health, leaf colour, pests and uniform water distribution.
Harvesting and storage
Harvest when the fruit has reached the stage of maturity typical for the cultivar. For longer-term storage, dry, grind or freeze the chillies. Process only healthy, clean plant parts and follow the food-hygiene requirements of the chosen preservation method.
Troubleshooting
- Tall, soft plants: check light levels, spacing and temperature.
- Leaf-edge damage or chlorosis: check not only EC but also pH, water hardness and nutrient formulation.
- Brown roots: investigate temperature, oxygen supply, hygiene and waterlogging.
- Uneven yields: compare flow rates, emitters, plant spacing and cultivars.