Mother nature will inevitably take her toll on your greenhouse cover, but as long as the damage isn't extensive, minor holes can be patched. Greenhouse repair tape is a UV-resistant, polyethylene-backed tape engineered for outdoor use on greenhouse covers. It's highly puncture-resistant, and is most suitable as a short-term solution. Think of the tape as an emergency bandage until you can replace your cover.
Americover Reinforced Greenhouse Repair Tape is a great solution if your greenhouse still has a few years left. It has
UV and weather resistance for exceptional durability and strength
High adhesion and cohesion.
Aggressive adhesion to films.
Conformability to irregular surfaces without additional screws or staples.
The strength to withstand extended exposure to the elements.