Do Brussels sprouts need full sun?
Written by
Paul Reynolds
Reviewed by
Prof. Martin Thorne, Ph.D.Brussels sprouts prefer at least six hours of direct sunlight a day for successful growth and production. This minimal light will support the photosynthetic process, resulting in energy for the sprouts. In the case of plant leaves receiving less light, development will be slow, and the sprouts will be of inferior productivity. Additionally, properly exposed plants can withstand disease better as a result of the process that takes place during the remainder of the growing season.
Morning sunlight makes the most rapid and beneficial growth possible throughout the day, as the keen rays of the sun do not heat plants to excess. Whenever practicable, plant so that it receives the sun from the east. Afternoon shade is of great value in hot climates when the thermometer stands at above 85 degrees, as it prevents scalding, imparting a bitter taste, and causing premature bolting.
Northern Climates
- Maximize all-day sun exposure
- Use reflective mulch for light amplification
- Avoid shading structures
Hot Regions
- Provide afternoon shade after 1 PM
- Use 30% shade cloth during heat waves
- Mulch heavily to cool roots
Partial Shade Areas
- Prioritize morning sun locations
- Prune surrounding foliage for light access
- Select shade-tolerant varieties
Look out for sun stress indicators. If leaves are looking yellow, there may be excessive light. Creeping leggy growth upwards could equally indicate a lack of light. Move plants into shade or relocate them to new locations. If you have container plants, turn them every week to prevent them from growing lopsided.
Shade management will become necessary in hot spells in summer. Rig up temporary cloths in a slatting effect during the afternoon and use tall-growing plants, such as maize and tobacco, to form natural screens. Place containers where any possible buildings will cast afternoon shadows across them. All these modes help maintain growth without significantly detracting from the proper amount of light.
Choose varieties that suit your conditions of light.Dwarf hybrids are somewhat more tolerant of partial shade than most heirlooms. Falstaff and Crispus will stand more shade than Long Island Improved. Choose according to the light conditions in your own garden.
Always bear in mind that the requirements of light change with the seasons. Maximize exposure in spring and fall, and provide summer protection during the height of summer. This seasonal procedure ensures even growth at all times, allowing all Brussels sprouts to be successfully grown in every situation if light is properly managed.
Read the full article: How to Grow Brussels Sprouts Perfectly
