And this on the pringlei:
Pringlei
Growing Information
In nature, Pringlei’s seeds are typically subjected to the digestive juices of bats and birds that transport the seed.
These juices actually aid the germination process by wearing down the seed coat. To substitute this process, the seed coats
should be filed down to allow moisture to reach the embryo. Following this, plant your seeds on the surface of a
cactus potting soil. Spray the soil lightly if moisture is needed and cover your container with clear plastic. Place the
seeds in bright light and keep them warm. Young Pringlei cacti also tend to grown in the shadows of larger plants, so it is
important that they be shaded. The cacti grow slow, so it would probably take many years before the cactus would require
full sun.
Seed germination tends to be irregular. GA-3 is said to improve and even out sprouting. Once established, little to
moderate watering is required.
Wait. This information is for a cactus. Are all the plants on your list species of Flaveria?
