There are no herbicides registered for use on spinach. Weed control is by hand. Fertilisers Spinach has a high demand for nutrients. Molybdeunm 2 kg sodium molybdate Poultry manure is an excellent source of organic matter and can be applied at 30 cubic metres per hectare, three days before sowing on established vegetable ground. This will add organic matter to the soil and supply nutrients for the first three weeks.
Spinach has a high demand for nitrogen and potassium.
Diseases and pests Spinach is not seriously affected by diseases or insect pests. However, it is susceptible to attack by root knot nematode and sugar beet nematode . Spinach may also be attacked by aphids , grubs , snails and weevils . Fusarium root rot disease may be a problem in summer, resulting in wilting and dying of plants. A good rotation will help to control this disease.