Letterbox Gardens are beautifully pre-printed growkit, with a choice of wildflower or herb seedsIs our narrowest grow kit with its large promotional space of approx. It is the ideal promotional item for postal shipping since it fits easily through any mailbox slot. The set still contains everything necessary,the growkit is filled with a large coconut fibre tablet and a small plant seed bag. We can add your logo/branding onto a white sticker 35 x 35mm to the sleeve.