Sorghum cane is often harvested in late September and October while it is still warm and dry enough for it to dry before being put in the silo. You may find green sugar and sorghum cane now but it won't be "ripe". Try the Louisiana-Mississippi Forum for sugar cane and sorghum. Try Alabama and LA-MS forums for sorghum. Sugar cane is often cut and used here as Halloween decorations. How about Johnson grass? It is sweet to chew on. Do you need living plants or just the cut stalks?

The link above for the Darwin experiences was interesting. I may consider some of those for an experiment. My flytrap is the only plant big enough at this point. I am so frustrated! This shipment of nine plants arrived and they are just barely seedlings! Two of then are actually so tiny that you can barely see them! They are just little sprouts, too little even to identify yet. I have had bad luck buying from other hobbyists. They are not showing me pictures and are not telling me how old the plants actually are. At this rate it will be a long time before I have a decent collection of plants. I am making it a point to specify OLDER, MATURE plants now when I buy. I guess I have been too trusting. Sorry, I guess I got a little off the subject there with my rantings.

Thank you farmfreedom! Radishes certainly grow fast and I can easily imagine being able to do not just the two required generations but more. Great suggestion. but... What properties of radish (color, shape, etc) are there that are controlled by single genes that would be obvious to my 8 year old? I have a general idea of how to cross pollinate flower (take a paint brush, brush the pollen from one flower and brush it on the next) -- is it just as simple for radishes? (I guess I have harvested any radish I have ever grown before allowing them to bolt/ go to flower) While I have planted radish seeds many times, where to I find the seeds on a mature radish plant?

Ah, yes, . . . the SCIENCE FAIR PROJECT !!!!! Actually, they weren't TOO awful !! One that DS did that was fairly easy to do . . . and I'm thinking that he was about in third grade . . . had to do with plants . . . I think the title was something like What Makes Plants Grow Good?? . . The idea being to feed plants different things and see which thing made them grow the best. I guess the control group was feeding them nothing . . . just watering them. There was Miracle Grow, milk, Coke, Coffee, Orange juice . . . Can't quite remember if there was anything else. Six test plants per item . . . that is, six plants per milk, six plants per coffee, etc. He watered/fed them every other day??? (not sure) Measured them every day. Took pictures with a ruler showing the height of the plants . . . also took notes on how the plants looked . . more green?? thick ??? dead ??????? etc. I think he did this for a month . . . His hypothesis was something like milk would make the plants grow better because milk makes people grow better . . . or something like that. Like I said, it's been a LONG time !!! Anyway, it was very do-able, fairly simple, lots of results, lots of pictures to post on the display board, plus, the plants themselves ! He used snapdragons, basically because the nursery had a bunch of snaps that were in good shape to begin with, and lots that were the same size. Marigolds could be another one. This project was a good one in that it was obviously something he could do HIMSELF !! So many projects are obviously projects done by Mom and Dad . . . Anyway, it all came out fine, and as I recall, he got an A on it . . . He put the six plants for each one, in a small rectangular planter, by the way . . . so I had LOTS of planters for the patio when he was done !! I think he came up with the idea after watching me dump my old coffee on plants, and they seemed to really like that caffeine !! So, he figured he'd try stuff like milk !! Well, best of luck with it all !!!!! Really, they're not bad at all . . and it's really fun going to the science fair to see all the stuff the kids have come up with . . .