Sweet Pea Mars Seeds Are The Ones To Sow If You’re After High Impact In Your Garden. The Good Scent & Colour Produced By This Sweet Pea Make It A Must Have Flake Type For Indoor Displays. The Perfect Blend Of Red & White Make Mars A High Impact Sweet Pea That’s Full Of Character. A Well Scented, Striking Red Flake On White Background, Although Photos Never Seem To Do It Justice But It’s Guaranteed To Make An Impact In The Garden.do Not Allow Seed Pods To Form As This Will Reduce Flowering Performance. Autumn Sown Seedlings Are Best Over-wintered In A Cold Frame.