Natal Has The Biggest Pompon Heads Youll Find!dahlias Will Grow Almost In Any Location, In Any Soil But They Relish Good, Loamy, Well-drained Soil & Lots Of Sunshine.plant The Tubers When There Is No Risk Of Frost & The Soil Has Warmed Up. When They Are One Foot Tall Start Staking Them.lift After The Frost Has Touched The Plants & Store The Tubers In A Cool, Dark & Frost Free Place Over Winter.