Most indoor plants don't die from neglect they die from being in the wrong container for their root type. A self watering pot keeps consistent moisture at the root zone. That's ideal Not sure how wide these lavender will grow (instruction only gives height). Does this spacing look ok if I plant the two potted ones in these positions? (ie. One between the ones Dieffenbachia Tiki Care Sun, Water, Soil & Humidity Needs Gold Leaf Botanicals Watering Hoses & Hand Watering Greenhouse Megastore Mia Gold Metal Vertical Wall Planter with Three Mini Pots The Dumb Cane Plant: Caring for Dieffenbachia The Little Botanical