It is best to plant the roots outside your greenhouse, if this is not possible you will need a large area inside. Take out 1 foot of soil, dig over the next foot, working in grit, small pieces of broken flower pots or old broken bricks. Put back 6 inches of good compost, add 2 ounces hoof and horn, 2 ounces super phosphate, and 1 ounce of sulphate of potash per square yard. Cover with some of the soil you took off in the first place. Plant your vine at an angle of 45%, top nearest north.