derek thomas is here.isn't there an album called the secret life of plants. >> there is. >> people talk about talking to their plants if you are astute to the cues, your plants talk to you not very wellly but signs what is going on with their -- not verbally but signs what is going on with their leaves. >>> you have examples. >> this is an american box wood the greener foilage is the correct foilage this foilage is telling us, a couple things a, there is a nutrient deficiency happening in the soil most likely lime, but, the fact that the soil has -- the plant has started to turn yellow, tells us, that this is what it should look like, this tells you that something is actually wrong. >>> now, not all the time are yellow leaves something bad. we talked about this, earlier, these are -- this plant is experiencing a little bit of stress but this plant which has gone completely dry, has actually gone dormant the way you know that, is you see the really nice buds there, that is next year's growth. >> okay. >> if