Perpetual spinach
Beta vulgaris var. cicla is suitable for hydroponic self-sufficiency in DWC or drip-irrigated substrate systems.
Why this crop is worthwhile
Botanically, perpetual spinach is a type of chard harvested repeatedly over a long period. The question is not only whether a plant grows hydroponically, but also whether its edible proportion, growing time, light requirements, workload and storage life suit the household.
System and root space
DWC or 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.
Relevant system pages: Deep Water Culture (DWC) · Drip irrigation and Dutch buckets
pH, EC and climate
A cautious starting range is pH 5.8–6.5 and EC 1.6–2.3 mS/cm at 15–24 °C. These are not universal target values: the cultivar, age, light, source water, temperature, measurement method and growth stage may require adjustments.
Sowing and crop management
Manage it like chard: protect the growing point and remove old leaves cleanly. Run a small preliminary trial to check germination and behaviour in the system. Space plants approximately 25–35 cm apart and regularly inspect root health, leaf colour, pests and even water distribution.
Harvesting and storage
Harvest the outer leaves continuously. For storage, blanch and freeze. Process only healthy, clean plant material and follow the food-hygiene requirements of the chosen preservation method.
Troubleshooting
- Long, soft plants: Check light levels, spacing and temperature.
- Leaf-edge damage or chlorosis: Check not only EC, but also pH, water hardness and the nutrient formulation.
- Brown roots: Investigate temperature, oxygen, hygiene and waterlogging.
- Uneven yields: Compare flow, emitters, plant spacing and cultivars.