'Crimson' is a Grimo hazelnut. It is a hardy red leaf hazel, possibly the most hardy ornamental hazel cultivar. It is a 'Wisconsin source' hazel with deep red leaf colour and large frilly husks that remain red until harvest in late September. Despite being marketed as an ornamental variety, it produces modest crops of decent sized nuts. Kernels are .99g and 34% kernel in Ohio. It is expected to grow to about 2 metres tall, but grows to 3 meters in exceptional soils. It is hardy from zone 4-8. It suckers readily. The pollen alleles are not advertised, but it is pollenated by 'Slate' in practice.
