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Bright's Hybrid #5® (USPP Pending)
This peach/almond hybrid was originally bred by Bright's Nursery and is the #5 selection. It is a vigorous rootstock used for almonds. It is rootknot nematode resistant and does well in well drained soils.
Ishtara (PPAF)
A peach/plum hybrid for use with almonds, peaches, nectarines, and plums. Tolerates heavier soil than peach rootstock.
Krymsk® 86 (USPP Pending)
A peach/plum hybrid originating from Russia. It is compatible with almond, peach, plum, and apricot. It creates a tree similar in size to Lovell rootstock. Exhibits superior anchorage in early years compared to peach and peach/almond hybrids and seems to tolerate heavy and wet soils. It appears compatible with Nonpareil almond and produces suckers, but significantly less than Marianna 2624.
M-40 (USPP #11403)
M-40 exhibits superior rooting depth relative to Marianna 2624, fewer unwanted suckers (labor saving), and is compatible with many prunes, apricots, and Japanese plums. Its almond campatibility is similar to Marianna 2624. Good wet soil tolerance.
The following rootstock were selected by Dr. Helmut Jacob at the Research Station in Giesenheim, Germany: The following two rootstocks are of Russian origin:
Pyro™ 2-33 var. Rhenus 3 (USPPAF)
Another reportedly precocious rootstock. Vigor similar to OHxF 87.
Krymsk® 5
It is a cherry rootstock that could be a replacement for the Gisela® series. It creates a tree about 90% of Mazzard. It is precocious and seems to do well in adverse condidtions.
  Krymsk® 6
It is a precocious cherry rootstock that could be the replacement for the Gisela® series. It is semi-dwarfing, about 75% the size of Mazzard.

Almond & Tree Fruit Rootstocks
 
Lovell
Nemaguard
Hansen 536 Peach/Almond Hybrid
Nickels* Peach/Almond Hybrid
Krymsk 86*

M-40*

Marianna 2624
Myrobalan 29c
Myrobalan
Ishtara*
Citation*
Soil Type Adaptability
Well drained soils, does not like wet feet or heavy soils.
Well drained, sandy-loam soils. Very susceptible to wet feet.
Well drained soils, drought tolerant, calcareous soils okay.
Better adaptability than Hansen 536.
Very adaptable.
Best in heavy soils.
Very adaptable especially very heavy soils.
Medium to heavy soils.
Wide range of adaptability.
Alkali soil tolerant.
Varied
Wet Soil
Moderately susceptible
Very susceptible
Very susceptible
Moderately susceptible
Moderately tolerant
Tolerant
Very tolerant
Tolerant
Tolerant
Tolerant
Tolerant
Anchorage
Good
Good
Very good
Very good
Excellent
Good
Good
Good
Excellent
Moderate
Good
Vigor
Moderate
High
Very high
Very high
Moderate
Moderate to low
Moderate to low
Moderate
High
Moderate to low
Moderate
Root Suckers
None
None
None
None
Few
Few
Many
Some
Few
None
Few
Phytophthora Resistance
Low
Low
Very Low
Very Low
Unknown
Fair
Fair
Fair
Fair
Fair
Fair
Bacterial Canker Resistance
High
Low
Unknown
Unknown
Unknown
Low to Moderate
Very Low
Low
Low
Unknown
Low
Crown Gall Resistance
Fair
Fair to Good
Fair
Fair
Fair
Good
Good
Fair to Good
Good
Fair
Low
Root Knot Nematode Resistance
Low
High
High
High
Low
High
High
High
Low
High
High
Oak Root Fungus Resistance
Low
Low
Low
Low
Low
Unknown
Very high
Some
Low
Unknown
Unknown
Compatability
Almond, Apricot, Nectarine, Peach, Plum, "Prune"
Almond, Apricot, Nectarine, Peach, Plum, "Prune"
Almond, Apricot, Nectarine, Peach
Almond, Apricot, Nectarine, Peach
Almond, Nectarine, Peach, Plum, "Prune"

Apricot, Almond, Plum, "Prune"

Almond, Apricot, Plum, "Prune"
Apricot, Plum, "Prune"
Apricot, Plum, "Prune"
Apricot, Nectarine, Peach, Plum, "Prune"
Apricot, Plum
COMMENTS
More precocious and cold hardy than Nemaguard
Susceptible to Verticillium wilt.
Frequently used for replants where Phytophthora is not present.
Higher chilling requirement than Hansen 536-should improve transplant problems some growers have experienced.
Anchorage is exceptional in trials of young trees.
Resistant to prune brown-line
 
Seedling rootstock
Appears tolerant of high soil pH.
Precocious. Increased size and sugar content of fruit. Intolerant of virus in peach and nectarine.
* Refers to Patented or Patent Pending Items.
Marianna 2624 compatibility with Almond Varieties:
There is considerable difference in the degree of compatibility of almond varieties on this rootstock and also their productivity. Also be aware of increased incidences of Union Mild Etch considered by some to be incompatibility; new research is pointing to excessive irrigation practices contributing to this problem.

Compatible - Aldrich, Carmel, Fritz, Mission, Neplus, Nonpareil Advantage™, Padre, Peerless, Ruby, Sonora, Wood Colony
Intermediate - Butte, Monterey, Winters
Incompatible - Kapareil, Nonpareil, Solano


Cherry Rootstocks
 
Krymsk 5*
Krymsk 6*
Performer
Gisela 12 *
Gisela 6 *
Mahaleb
Mazzard
Soil Type Adaptability
Very adaptable even heavy soils.
Very adaptable even heavy soils.
Adapts well to light, sandy-loam soils. Very poor in heavy soils.
Very adaptable even heavy soils.
Very adaptable even heavy soils.
Adapts well to light, sandy-loam soils. Very poor in heavy soils.
Adapts to sandy-loam to loam soils. More tolerant of heavy soils.
Wet Soil
Moderately resistant
Moderately resistant
Susceptable
Moderately resistant
Moderately resistant
Very susceptable
Moderately susceptable
Anchorage
Good, may require staking in windy sites.
Good, may require staking in windy sites.
Very good
Good, may require staking in windy sites.
May require staking.
Very good
Very good
Vigor
80% the size of Mazzard.
70% the size of Mazzard.
70% the size of Mazzard.
80% the size of Mazzard.
90% the size of Mazzard.
70% of Mazzard.
Considered to be the "standard" tree size, about 20 feet high.
Root Suckers
High
High
None
None
None
None
Few
Phytophthora Resistance
Unknown
Unknown
Moderately resistant
Moderately resistant
Moderately resistant
Susceptible
Moderately resistant
Bacterial Canker Resistance
Unknown
Unknown
Resistant
Good resistance
Good resistance
Resistant
Susceptible
Crown Gall Resistance
Semi-resistant
Semi-resistant
Semi-resistant
Semi-resistant
Semi-resistant
Semi-resistant
Susceptible
Root Knot Nematode Resistance
Unknown
Unknown
Unknown
Unknown
Unknown
Suceptible - M. javinica resistant - M. incognita
Resistant
Oak Root Fungus Resistance
Unknown
Unknown
Unknown
Unknown
Unknown
Susceptible
Moderately resistant
COMMENTS
Precocious, lower flower density than Gisela, may be easy to manage crop loads.
Precocious, lower flower density than Gisela, may be easy to manage crop loads.
Not recommended for Chelan or Tieton varieties. Prone to extensive Gopher damage.
Precocious. An excellent mid sized tree. Gaining in popularity. Requires timely specialized pruning.
Winter hardy.
Stimulates precocity and heavy bearing. Excellent fruit qualtiy. Requires timely specialized pruning. Winter hardy.
Not recommended for Chelan or Tieton varieties. Prone to extensive Gopher damage.
Most popular rootstock in Pacific Northwest.
* Refers to Patented or Patent Pending Items.

Pear Rootstocks
 
Betulaefolia "Reimer"
Winter Nelis
OHxF 97
OHxF 69 *
OHxF 87 *
Pyro 2-33 *
Provence Quince BA-29c
Soil Type Adaptability
Very good, especially very heavy soils.
Very good
Very good
Very good
Very good
Very good
Very good, especially very heavy soils.
Iron Chlorosis
Moderately susceptible
Tolerant
Tolerant
Tolerant
Tolerant
Unknown
Very susceptible
Wet Soil
Very tolerant
Tolerant
Tolerant
Tolerant
Tolerant
Tolerant
Very tolerant
Anchorage
Excellent
Excellent
Good
Good
Good
Good
Fair
Vigor
Very high
High
High
Moderate
Moderate
Moderate
Low
Precocity A
Moderately low
Moderately low
Moderate
Moderately high
Moderately high
Moderately high
High
Yield Efficiency B
Moderately low
Moderate
Moderate
Moderately high
Moderately High
High
High
Cold Hardiness
-15 o F
-20 o F
-20 o F
-20 o F
-20 o F
-20 o F
-5 o F
Pear Decline Tolerance
Tolerant
Tolerant
Tolerant
Tolerant
Tolerant
Tolerant
Moderately tolerant
Fireblight Resistance C
Good
Moderate
Good
Good
Good
Good
Low
Crown Gall Resistance
Good
Low
Good
Good
Good
Good
Good
Root Lesion Nematode Resistance
High
Low
Low
Low
Low
Low
High
Oak Root Fungus Resistance
Moderate
Moderate
Moderate
Moderate
Moderate
Moderate
Moderate
Compatibility
Excellent with all cultivars. Best choice for Asian Pears.
Excellent with all cultivars.
Excellent with all cultivars.
Excellent with all cultivars.
Excellent with all cultivars.
Should be good.
Poor with most cultivars.
COMMENTS
Excellent choice for replant situations. Produces larger fruit.
Fruit size significantly larger than Bartlett seedling, plus exceptional yield as reported in PNW research.
Popular rootstock, clonally propagated.
Especially good for vigorous, low precosity varieties. Recent trials show Bosc and Bartlett perform well on OHxF 69.
Best for Anjou, lends itself to high density.
Close to the size of OHxF 87, setting fruit in years 2-3.
Superior rootstock for Comice and Taylor's Gold in non-cold hardy areas.
*} Refers to Patent or Patent Pending Items
A} Precocity can be varied with pruning and training techniques.
B} Yield efficiency is a rating of total fruit by weight per unit of land area occupied by a tree.
C} Fireblight resistance refers to resistance by the rootstock only, and does not refer to resistance imparted to the cultivar.
Note: Cultivar vigor and precocity along with rootstock vigor and precocity should always be considered when deciding on your tree combinations.

Unauthorized propagation of patented or trademarked varieties or rootstocks is unlawful and prosecutable. Purchase of trees does not authorize you as the grower to propagate any additional trees of the variety, donate, sell or otherwise transfer to any third party reproductive material of the variety. For more detailed information on your rights contact Fowler Nurseries, Inc.

*We are grateful to those who generously share their research and discoveries, allowing us to market these fine varieties and rootstocks.
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