you can as long as it is sieved and fine and has good drainage.
hard to say with out close view but it might be leaf curl or you may have put too rich a compost or rust virus at a quess.
montanias do well on climbing on things like obelisk.
some sort of lily.not sure.
my hubby got old decking from a skip and it made fantastic raised beds for nothing.
They do not like be pruned ,like a lot of water,and I love making Quince jelly .
with the loss of front gardens and now the start of loss with back gardens ,its no wonder we are losing our wildlife.
Rosemary,gives a lovely fresh smell when left in the oven after you have finished or put in boiling water and leave on shelf out the way of little hands ,or use make as a disinfectant .
been east Quantocks , a lovely place next to the Quantock hills.Its a lovely spot to walk and have a good cream tea at Kilve.
Quince take a lot of room and like a wet area and a garage would not be the best place (I have a quince). you could grow them next to the garage but I think you would find problems with roots and leaves falling on the guttering etc.