For some reason our Mars grapevine has grown like crazy this spring. It has set on grapes all along its length, and I'm afraid it will be stressed and we'll lose our grapes. I looked up fertilizing grapes and found to my surprise that a high-nitrogen fertilizer is recommended. Whoopee, we have chickens who put out a lot of high nitrogen, as well as nice eggs. I have a 5-gal bucket of composted chicken output. If I put the whole bucket on the vine, will I be overdoing it? It isn't pure output--it's been in the compost pile so there is green and brown stuff mixed in. It is really important that we get grapes. We have a neighbor who swears you can't grow grapes in Texas. He also tells me every year we can't grow roses, or asparagus, or . . . .