Trademarked as Maxma® in the USA – This hybrid rootstock is a result of a cross between Mazzard and Mahaleb.  It is rated in vigor as 20-25% more dwarfing than Mahaleb.  This lends itself to higher density plantings.  Maxma® 14 is compatible with most cherry varieties and is quite precocious and productive.  It is considered to be one of the leading rootstocks in use in Europe.  Maxma® 14 rootstock is tolerant to wet soils and is resistant to iron chlorosis.