Plants are living things with diverse, and sometimes complex, living requirements and it's essential to know these prior to planting. The ultimate success or failure of a given planting is in the hands of the grower, and one should always research the particular requirements of a plant prior to purchasing.  That said, proper attention during planting (both to site conditions and transplanting), proper mulching for trees, and adequate irrigation (avoiding over-watering) during establishment are essential, and can offset most problems. Our guarantee extends to the provision of healthy, true to type stock delivered in good condition. We assume no liability beyond this point, though are happy to provide input and advice if any issues should arise post-planting. Our goal is to see these useful and interesting plants become more widely established: your success is our success.