Nic® 4, 8 & 19 apple rootstock Fruit tree variety from ANFIC Sub clones of M9 from Belgium. Patented rootstocks selected by the Belgian Nursery Rene Nicolai NV. Nic® 4, 8 & 19 Commercial or trial status Commercial Vigour Nic® 4 & 8: The least vigorous of the Nicolai series of apple rootstocks and comparable to FL56. Nic® 19: About the same size as M9. Precocious, medium vigour of the Nicolai series.