Hi, I have a ZZ plant which I've had for about 2 years and is seems quite healthy (5 branches, 2ft tall. I want to start 2 new plants for each of my grown sons because these plants are soooo easy to care for. I thought they'd be the perfect plant for these guys since they both tend to forget to water their plants. How do I go about starting new plants? Please I need step-by-step instructions. BTW, what kind of fertilizer is best for the ZZ plant. I appreciate any/all help that I receive.