Good evening, I currently have ground cover Vinca in my mailbox flower bed (Full Sun/ Zone 7 Maryland). They will not appear until sometime in June. What else can I plant there in the meantime to get some color? Even though our deer eat what they please, deer resistant is preferable : ). Thanks!

I wonder if they will eat marigolds? If you surround the plants with marigolds they might be protected a bit...assuming they leave them alone.

Vincas -- Catharanthus rosea are supposedly deer resistant.

Vinca (Catharanthus roseus)

Have you thought about daffodils? I'm pretty sure deer won't eat them & they are great for Spring. Not sure if the vinca would hide the dying leaves of the bulbs though.