Coffea: Greenhouse Plants
W – warm, minimum of 13°C (55°F)
Coffea arabica is worth growing for its attractive glossy foliage as well as for its white fragrant star-shaped flowers borne along the stems in summer. These are followed by red fruits, each of which contain two seeds which are the coffee beans which roasted, ground and brewed end up in our coffee cups. Planted in a border this plant will reach 2 or 2.5 m (7 or 8 ft) but pot grown will stay at 1.2 m (4 ft). For those short of room it is useful to know about C. a. ‘Nana’, which is the dwarf form, flowering and fruiting while only 45 cm (U ft) tall. Watch out for attacks of scale insect or mealy bug, the honeydew from which will encourage sooty mould to form on the leaf surfaces. Any pruning should be done in spring whencan also be tried although they are not easy. Soak seed for 48 hours before sowing in the light at 21-26°C (70-80°F) in March.