Approximately 16 seeds per gram
seed-counts are only a guide, not to be used for accurate calculations.
B and T World Seeds' reference number:
USDA average, annual, minimum temperature Zone:9
Type of plant - tree
Flower: WHITE to PINK (RED), 3-4cm. dia.
Fruit: to 45x25mm., cyl., ribbed
Foliage: to 30x12cm., dark, shiny
Height in meters: 15x10
Common names for Corymbia ptychocarpa:
is included in the following B and T World Seeds flowering plant categories:
17: Eucalypts Relatively Tender in UK (most Species)
19: Everlasting and Dried Flower Seeds Australian and Other
44: Cut flowers Commercial and other Recommended Varieties
169: Sandy Soil Plant Seed List
179: Street Tree Seeds
185: Plant Species whose germination is improved by Smoke
191: Tropical Shrubs and Trees
192: Tropical Commercial Selection Trees Shrubs and Flowers
Corymbia ptychocarpa seeds will usually germinate in 14-90 days, even under good conditions germination may be erratic. Sow Corymbia ptychocarpa seeds on the surface of a Peaty seed sowing mix at about 22°C.
Stratification (cold treatment or vernalization) Some seeds need to be overwintered before they will germinate. Some seeds need just a couple of weeks, others 3 months. Seeds can be stratified in dampened peat or sand, in a plastic box or bag at 4°C or 5°C in a refrigerator. The seeds should not be frozen or in a wet medium. Very small seeds can be sown on the surface of their growing medium, in pots sealed in plastic bags, and kept in the 'fridge. Many vernalized seeds need light to germinate when they are sown in the "Spring".
Sow seed and chaff together. (Pre-chill for 4 weeks).