ZZ Plant Care Watering, Fertilizing, Propagating, and More Bob Vila Common and Popular Succulent Species Yard and Garden Can ZZ plants be kept outside and how often should they be watered? Heres what Ive been using on my #plumeria plants, Sea Grow is an amazing line fertilizers and in between inflos I would use their balanced, 16 16 16 fertilizer. I like the water soluble ones, like Crop Planting Tool West Coast Seeds