Buttonbush - Cephalanthus occidentalis - North American native wetland shrub with multiple trunks. Adapted to a wide range of soil types. Glossy leaves and clusters of fragrant white blooms are followed by 1 inch button-like seeds. Good ornamental or wildlife planting. Hardy to -30F (-34.4C); height: 15ft.
|#1748 Packet $5.00, Approximately 100 seeds|
Warm stratification is required to soften hard seed coats and to allow the embryo to mature. Embryos must be mature to germinate and they must be moist to mature. Warm stratification is achieved by soaking seed in warm water for 8-24 hours. Extremely hard seeds such as hickory may be "scarified" or nicked, but care must be taken not to damage the embryo. A better method is the hot water treatment.
Cover the seed with boiling water and allow to stand for 12-24 hours. IF any seed is floating in the water at the end of this time, repeat the process. Those that have sunk or swollen may be planted.
Drain the water from the seed. Take a handful of sphagnum peat, vermiculite or other sterile moisture medium and place it in a zipperlock plastic bag. (Sphagnum peat is best for warm stratification as it contains anti-fungal properties.) Add enough water to thoroughly moisten the seed and allow it to rest for a couple of hours. Hold the bag upside down and squeeze out any excess water. Add the seed to the bag and shake to mix. The temperature should remain between about 68 and 86 degrees F.
Check the bag about once a week. If you notice any mold forming inside the bag, remove the molded seed and throw them away. If the moisture mix appears to be dry, add enough water to moisten it and squeeze out any excess water, then re-seal the bag. Check the next day to make certain that no water is standing in the bag. If so, pour it out
(see also: NATURAL STRATIFICATION, COLD STRATIFICATION)
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