Houseplants That Are Hard to Kill Pursuing Pretty Trees can reduce temperatures and cool the atmosphere! They reduce temperatures by blocking sunlight from hitting surfaces like roads, buildings, and soil. Shaded areas can be 1025C cooler at the surface compared What plants grow well in gravel? : r Aquariums Do I Really Love Fabric Grow Bags? Hydrangeas Blue Pachypodium lamerei (Half mens) Pahcypodium means "thick foot".(Refers to swollen stem). Leaves are only at the top of the stem and ends of branches. It has green leaves with pale yellow midribs. California Native Plants for the Garden