Seed Production and Dissemination
Bluegum eucalyptus seeds are relatively large for a eucalyptus. There are 18 to 320 seeds per gram (500 to 9,100/oz) of seeds and chaff, or about 460 clean seeds per gram (13,000/oz) (2,5,15). Capsules release seed immediately on ripening and the seed is dispersed by wind. Calculated dispersal distance from a 40-m (131-ft) height, with winds of 10 km/hr (6 mi/hr), was only 20 m (66 ft). Newly released seeds germinate within a few weeks if conditions are suitable. Trees usually begin to produce seeds at 4 to 5 years and yield heavy seed crops in most locations at 3- to 5-year intervals (23). Seeds can be stored for long periods in air-tight containers at 0° to 3° C (32° to 38° F).
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