We took a grapefruit from Palm Springs, CA this last week, and just cut it open. You can imagine our surprise when we found this: http://paulrittman.com/Sprout.jpg Now that we have it, we'd like to try to keep it alive until growing season (spring?). What is the best thing to do---leave it there, and just water the grapefruit? Or take it out and put it in a cup of water, keeping it indoors? Or??????