Plumed Cockscomb - Celosia argentea Mixed Color 250 seeds If planning to grow Celosia outdoors from seed then it is best to sow them in a partially shaded or sunny area of the garden before the last frost of spring. Once sown then celosia seeds should be covered. They prefer soils that are moist with a pH of 6 to 7. If you plan to grow Celosia seedlings indoors first then they should be prepared about 7 or 8 weeks before planting then out after the last frost of spring. They take around one to two weeks to germinate at a temperature of about 22 to 24C. The should be spaced from 30 to 45 cm apart depending upon the size of celosia species. All seed counts should be considered estimates. Some of our seeds are estimated by weight. These weights are often based on our supplier weights and/or the weight of the average of several samples of the same seed. We do our best to ensure accuracy and will often add extra seeds. However, all estimates are final. [Hosted by imgur.com] Due to varying conditions regarding germination like moisture and temperature or soil contamination also buyers experience and knowledge of seed germination with these factors I cannot guarantee germination rates. I do guarantee all seeds are fresh and germination tested to make sure seeds are good and viable.