Hi Annie,
Wow 19 cats,..i presumed i was overpopulated with cats when i had 12,..i think the ones i fed and just muttered to passed the word around that i was a soft touch however i am now reduced to 5 that sleep in,.. they come and go but never even use the litter tray,..they still insist on going out,..suits me,..if they are unwell it has being known they may use the litter tray,..you are top of the list in my book for looking after all your 19 cats not many people are that caring.
Ah yes the containers,..i only started this when i ran out of space,..i converted the pathway under my window for containers and made a smaller path for access,..the Wallflowers have such a strong sweet scent i potted them in tall containers so they would be at nose level lol,..the Phygelius have three inch drooping blooms so it was better to view them from a higher point,..it just went from there to more containers due to running out of space in the main garden area.
When i had 11 cats.