👉 How to Grow Dahlias from Seed (Step by Step) Save this reel for later! 🌱 But first things first, you must know that dahlias grown from seed will not be the same as the dahlias you collected the seeds from. Dahlias have eight sets of chromosomes, which leads to incredible genetic diversity. This means it’s a wild card when it comes to growing from seeds—you won’t know what you’ll get until they bloom. This is how breeders create new varieties! Some dahlias produce lots of seeds, others little