This spring our Meyer lemon tree needed replanting. I have been saving corks for several years now; my big plan is to insulate Scott’s office wall – if I ever accumulate enough.
Cork collection
However, when I saw this idea in an urban farming magazine, I decided to sacrifice some of my precious corks for the project.
Cork mulch around the potted Meyer lemon
Turning the corks upside down exposed the ends variably-stained by wine
Corks covering the soil will reduce dehydration – a common problem with (my) houseplants
I really like the random coloured pattern of the stained cork ends. Ideally the corks would sit well inside the pot, but Scott had already transplanted the tree before I remembered my plan. Hopefully it will work!
Sustainable Scientist 
Fabulous! I tend to save corks to use as cane-toppers, but this might be a better idea. Presumably you could slice them in all in half if you didn’t have enough, although it would make a thinner layer. Good luck with the wall insulation project – you’ve got some drinking to do…
We may try this! Thanks for the idea.
What a great idea! Keeps the plant hydrated, looks nice, and stops the pesky weeds from springing up where you don’t want them.