BROCCOLI

pH: 6-7
Plant spacing: 40-70 cm (3-5 plants/m2)
Germination time and temperature: 4-6 days; 25 °C
Growth time: 60-100 days from transplant
Average daily temperature: 13-18 °C
Light exposure: full sun; can tolerate partial shade but will mature slowly
Plant height and width: 30-60 cm; 30-60 cm
Recommended aquaponic method: media beds

 

Growing broccoli in aquaponic units. Broccoli is a nutritious winter vegetable. The media bed method is the recommended option as broccoli is a large and heavy plant at harvest. Broccoli is moderately difficult to grow because it is a nutrient-demanding plant. It is also highly susceptible to warm temperatures; therefore, select a variety that is bolt-resistant.

Growing conditions: Broccoli grows best when daytime temperatures are 14-17 °C. For head formation, winter varieties require temperatures of 10-15 °C. Higher temperatures are possible, providing that a higher humidity is present. Hot temperatures cause premature bolting.
Growing instructions: Transplant seedlings into media beds once 4-5 true leaves are present and the plants are 15-20 cm high. Seedlings should be positioned 40-50 cm apart as closer spacing will produce smaller central heads. Broccoli, as well as cabbage, is susceptible to cabbage worms and other persistent pests. While some mechanical removal can have marginal effect, treatment with biological pesticides and repellents can control the infestations.
Harvesting: For best quality, begin harvesting broccoli when the buds of the head are firm and tight. Harvest immediately if the buds start to separate and begin flowering (yellow flowers).