N.L.
I would send your mom some flowers at her place of work from your daughter and you. Let her know that she is more beautiful than the bouquet or Thank her for her hard work in helping you to begin your garden. It's the little things. Just keep reminding her.Leave a note behind on bottle in the fridge. I'm sure that you can get creative. Cuddle with your mom on the couch.
This will continue to be a struggle, as your daughter gets older she might want to be the Gma who watches her more often. Your daugher will not understand, she will just want what is comfortable. Family gatherings may be difficult. Stand by your mom, the best you can.