One of the best — and cheapest — ways to add more plants that have proven successful in your garden is to divide perennials, Joe Gardener says. Plants such as hostas and day lilies can be split soon after they emerge from the ground by cutting through their center of their root bulbs with a sharp shovel or spade. After digging up a portion, you can plant it in another area of your yard to improve upon your landscaping for free. Likewise, spring is also a good time to thin out any overgrown perennials — and if you no longer have room for the transplants, you can give them away to friends and neighbors.