Where the Heart Goes, Flowers Grow $20.00 Inside Message Blank Inside Packages of Heartstrings® cards are shrink-wrapped and sold in sets of 10 cards with envelopes. The actual card size is 4 1/4" x 5 1/2". Where the Heart Goes, Flowers Grow quantity Add to cart SKU: 573. Categories: Gardening, Hearts. Related Products If Fences Were Flowers $20.00 The Plot Thickens $20.00 Plant Peace $20.00 Once in a while, I dig in my heels $20.00