Beginners Gardening

I live near a park and the possums have a tree -tree route to the garden. THey stripped my strawberry plant, pulled up all the young onions, ate the pears and tomatoes, the list goes on… who has a good way to stop them?
Pretty sure it is possums – have seen then doing it!! I am in australia, we possibly have different possums over here.

If I put weedkiller down now , how long would I have to wait before planting bulbs and seeds
Also would one of those ready planted bio degradable gro boxes be affected by weedkiller?

Good morning, my problem is that we’re going to have a group dish garden competition this coming thursday. How can we make a beautiful dish garden wherein the materials are only cost 500? We’re in the philippines so what plant also can you recommend? The school will only give the soil so we’re free to choose any materials.Pls. reply!!!!
It’s a dish garden that we’re going to make.