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Rootstock

Advantages

Disadvantages
Nemaguard
peach seedling		 root-knot nematode resistant, vigorous, strong tree susceptible to root-leslon nematodes, prefers sandy soil, susceptible to oak root fungus & bacterial canker, prunes subject to brown line on this rootstock
Lovell
peach seedling		 slightly more resistant to wet conditions than Nemaguard but prefers well-drained soils, slightly more resistant to bacterial canker than Nemaguard susceptible to root-knot and root-lesion nematodes and to oak-root fungus, some what susceptible to bacterial canker, prunes subject to brown line on this rootstock
Citation
interspecific peach & plum-rooted cutting		 highly compatible with apricot and plum, induces early bearing, tolerant of wet soil conditions, resists root knot nematode, advances maturity and increases size and sugar content of fruit susceptible to crown gall, bacterial canker and oak root fungus, intolerant of virus with peach or nectarine
Viking
interspecific peach, almond, plum & apricot-rooted cutting (patented)		 vigorous, root-knot nematode resistance similar to Nemaguard, productive, precocious tree, increases fruit size, considered well anchored, less susceptible to bacterial canker than seedling rootstocks, tolerant of wet soil conditions, tolerant of saline and alkaline soil conditions intolerant of dehydration in transplanting - see note below
Atlas interspecific
(patented) peach, almond, plum & apricot-rooted cutting		 extremely vigorous, root-knot nematode resistance similar to Nemaguard, productive, increases fruit size, considered well anchored, tolerant of saline and alkaline soil conditions delays fruit maturity in some varieties, intolerant of wet soil conditions, intolerant of dehydration in transplanting - see note below
Titan Hybrid
Titan almond x Nemaguard
peach hybrid seedling		 extremely vigorous, may have root-knot nematode resistance, considered well anchored, tolerant of calcareous soil conditions trees may be excessively vigorous on good soil, may delay maturity of fruit, more susceptible to crown rot than peach seedling rootstocks, intolerant of wet soil conditions
Myrobalan 29-C
plum-rooted cutting		 makes large tree, immune to root-knot nematode, tolerates wet soils, less sucker development than Marianna 2624 tends to lean, some incompatibility with almonds, prunes subject to brown line on this rootstock, may set lighter crop than Marianna 2624, susceptible to oak root fungus
Marianna 2624
plum-rooted cutting		 slightly dwarfing, moderately resistant to Phytophthora crown and root rot and oak root fungus, tolerates wet soils, root-knot nematode resistant tends to lean, shallow roots the first few years, very susceptible to bacterial canker, incompatible with peaches, nectarines and some almond varieties, suckers profusely, susceptible to crown gall, almonds subject to brown line disease and union mild etch
Mazzard
cherry seedling		 more water tolerant than Mahaleb, cold hardy, resists root-knot nematode, vigorous, moderately resistant to oak root fungus slow to bear, large tree prone to root suckering, susceptible to crown gall, bacterial canker & root-lesion nematode, scion doesn't show buckskin infection as quickly as on Mahaleb
Mahaleb
cherry seedling		 more drought tolerant than Mazzard, resists bacterial canker, smaller tree than Mazzard, moderately resistant to crown gall and root-lesion nematode, shows buckskin infection quickly intolerant of wet heavy soils, attracts gophers, tends to sucker, susceptible to oak root fungus, some root-knot nematode susceptibility - very susceptible to Phytophthora crown and root rot and Prunus stem pitting
Colt (patented)
cherry rooted cutting		 tolerates wet heavy soils better than Mahaleb, resists bacterial canker; cherries on Colt are field resistant to cherry stem pitting drought sensitive, slight to not dwarfing under California irrigated conditions, susceptible to crown gall, not cold hardy (not a problem in California climate)
Zee Stem
on Citation		 Allows cherry growers to use appropriate peach/plum/almond rootstocks for the planting location, precocious and dwarfing when used with Citation rootstock. Improves fruit quality Crop managment may be needed on precocious varieties during early years. Not drought tolerant
M 9
apple layered cutting		 dwarfs to 40-45% seedling size, very precocious and productive, increases fruit size, has field resistance to cherry stem pitting disease shallow rooted & drought sensitive, trees require support, susceptible to fireblight and wooly apple aphid
M 26
apple layered cutting		 dwarfs to 55-60% seedling size, precocious and productive shallow rooted & drought sensitive, staking or trellis usually required, susceptible to Phytophthora, susceptible to fireblight and wooly apple aphid
M 7
apple layered cutting		 dwarfs to 65-70% seedling size, widely adapted to various soil conditions, moderately resistant to Phytophthora suckers, staking may be required, susceptible to wooly apple aphid
M 111
apple layered cutting		 tolerates waterlogging and drought, well-anchored, resists wooly apple aphid, dwarfs to 90% of seedling-rooted size, good for sandy soils susceptible to crown rot under very poor conditions
NCB
(Northern California Black)
walnut seedling		 vigorous, resists Verticillium wilt, oak root fungus and root-knot nematode susceptible to Phytophthora crown gall and root-lesion nematode, Persian (English) walnut on Northern California Black subject to black line
Paradox
NCB x Persian
walnut hybrid seedling		 very vigorous, may induce better quality and productivity. resists root-lesion nematode and certain Phytophthora species, grows better in heavy, wet or low fertility soils than NCB, resistant to oak root fungus highly susceptible to crown gall, may be less resistant to oak root fungus than Northern California Black, Persian walnuts on Paradox subject to black line

On Dehydration...

Trees on peach x almond hybrid rootstocks, including interspecifics,
are very sensitive to dehydration. While planting, keep roots damp
and irrigate after planting.