Notice the celosia and their "rooster comb" plumes. That is what makes them so very showy, unusual and a great display as borders and edging. Celosia aka Cockscomb come in the colors of red, yellow, orange, crimson, rose and purple. They make beautiful bouquets and look great both fresh and dried. Cockscomb are easy to dry just simply make into a bunch and hang upside down in a cool dark and dry place for about 2 months. Celosia will grow up to 30" tall.
I have personally seen Celosia grown from seed or plants. As seed they can be directly seeded into your flower garden or you can give them a head start by seeding indoors and transplanting later. If you choose to start seed outside be sure to do this after soil has began to stay warm for spring. Plants desire full sun and rich soil with lots of compost. They produce big, brilliant plumes when planted in moist not wet soil. In dry periods they should be watered routinely.
Summer or Fall makes no difference as cockscomb will bloom in either. After the first plumes appear pinch them back so they will continue to produce more plumes. While it may delay your excitement of early blooms you will be rewarded later.
While Celosia possess a resistance to insect and disease they can still be affected. Aphids enjoy the leaves and stem. If a problem does occur treat early with organic or chemical insect repellents and fungicide.