We start our seed propagation of Dudleya brittonii in fall when the temperatures start cooling down but before the daylight hours get too short and temperatures drop too low.
Below: Dudleya seedlings
Dudleyas do not like the summer heat and go through a period of partial summer dormancy, so propagation is generally much more successful during the cooler months.
Aside from Dudleya brittonii, we are beginning to seed Dudleya hassei as well.
Below: mature Dudleya brittonii