Hi folks,
I am hoping someone knowledgeable will be able to answer this question. I am trying to grow a grape plant on my terrace one floor above the ground to provide shade. I can't plant it down below because the goats will whack it. So I am going to build a giant "flower pot" out of bricks and cement on the terrace and fill it with earth and compost and start from there to have it wend its way across the trelisses I put up. My question is how much earth/soil do I need for a viable plant? (expressed in cubic metres or yards)
The proposed size of the "flower pot" is 40cm X 40cm X 18Ocm giving roughly 3 tenths of a cubic meter of soil area to root in. Would this be enough to sustain the plant throughout its lifetime? presuming I'd be feeding it from above with compost every year, as I would ordinarily do in the garden...
thanks for reading this far,
eric