Growing Celosia Plumosa From Seed. You can direct sow the seed barely covering it in your garden after your last frost. There are two types of celosia that are commonly known in horticultural circles.
Therefore if you like surprises you may get a few pleasant ones. Get the seeds from a nursery or online. You can direct sow the seed barely covering it in your garden after your last frost.
No matter which variety you are growing you treat the seed the same way.
Before you choose you should keep in mind that if you start celosia from seeds it is highly likely that you will get plants that are different from the parent plant. The seeds will begin to germinate within 1 to 2 weeks when the soil reaches 60 f. Celosia flowers produce a lot of seeds but if you ve never collected them it might be a little hard to figure out how to collect and save them. Celosia are grown from very fine seeds.