Grow For It $20.00 Inside Message Inside: We are So Proud of You 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". Grow For It quantity Add to cart SKU: 591. Categories: Gardening, Hearts. Related Products The Beet Grows On $20.00 Blue Columbine $20.00 Talk About It $20.00 Once in a while, I dig in my heels $20.00