"Animal and plant varieties will not be patented". Any new variety of seedlings you purchase does not have any patent rights on the seedlings themselves, but the "method of cultivating this new variety of seedlings" can be granted a patent. The natural breeding of the seedlings you purchased several years after planting, or the use of cuttings, docking, grafting and other methods, will not infringe the intellectual property rights of the first breeder of the seedlings.