Join MORP in saving Colorado’s most endangered apple varieties by becoming a Tree Guardian: 1) Plant a historic tree that has been DNA tested with results being unknown cultivar. The majority of these trees are likely rediscoveries. We may or may never know their historic names, but we can grow and get to know them again.
2) Register your Guardian Tree(s) at FruitRegisTREE.org. Please include its unique tree ID number located on the tag. In the event that MORP looses its copy, your guardianship efforts just might save some of these trees from extinction. We thank you.
Choose rootstock type depending on availability:
Malus domestica Standard sized seedling rootstock. This is what trees were historically grafted on. These will be large trees that will grow for a century or more due to their cold hardiness and drought tolerance. Plant 25 feet or more apart.
M111 Semi Dwarf rootstock. 3/4 size of standard. A good compromise if you want a slightly smaller tree. Plant 15 feet or more apart.
M7 Semi Dwarf, Smaller than M111. Probably not as long lived, but produces sooner. Longer lived than M26. Plant 12 feet or more apart.
M26 Dwarf, Short lived (a few decades), fast producing, needs staked, not drought tolerant or as cold hardy, plant as close to 1-2 feet apart.