The handy Harry’s or Henriette’s among us can create their own cover with the aid of a transparent cat protection or safety net. Others prefer the support from professionals like the people from https://www.kattenren.com/ to install a solid custom made catio. All budgets considered.
In order to furnish your garden in a cat-friendly way, you might want to inform yourself regarding the choice of plants. Avoid lilies, tulips, amaryllises or rhododendron as they can be deadly for your cat. The smell of catnip, valerian, spearmint and grass lily, on the other hand, are a good choice. Cat grass is nice for the cat to nibble on as it helps against hairballs and is full of folic acid which cats need.
Chemical pesticides are not a good idea if you have pets that prefer to be outside most of the time. In this case, you should better choose natural remedies, which are in fact better for your garden as well.
Climbing, jumping and scratching… Cats are active animals. Make sure you give them enough room to play in the garden. Also provide them with a spot in the shadow where they are able to rest, and some loose sand where they are able to relieve themselves.