Temperatures in conservatories can vary considerably between day and night, ventilate well during sunny days.
Try to avoid sudden extremes of temperature as this can stress plants and cause leaf and blossom drop. At the nursery we over-winter plants at 4 ° C (40 ° f) minimum. Whilst most Citrus can withstand temperatures just above freezing, they will fare far better if kept warmer. Small plants can be kept within the house on a south facing windowsill or by patio doors, away from radiators and larger plants kept in conservatories or greenhouses. WINTER CONDITIONSīefore the first frosts appear plants must be moved into warmer conditions for the Winter months. Although it is relatively hardy, it takes a lot of heat to bring it into flower therefore it is the only citrus we recommend leaving in the conservatory or greenhouse for the Summer or until it flowers which is late July early August. The exception to the rule is the Kumquat. If they are kept in a conservatory or greenhouse in the summer, they must have ample ventilation.Įxtreme care must be exercised in late spring, before plants have been moved outside, when the temperatures in conservatories and greenhouses can soar on sunny days, vents must be opened to prevent over-heating. The more sun the better!Ĭitrus can stand 38 ° C (100 ° F) or more, but above 35 ° C (96 ° F) will cease to grow, therefore they usually fare much better outside for the duration of the summer. They should remain in the sun for the rest of the summer. Plants should be placed in a shady spot and gradually crept into full sun over the course of a week or so to prevent leaf scorch.
Citrus plants are happy to stand outside after the spring frosts have ended (usually about the end of May).
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