Krymsk® 5
(cv. VSL-2) USPP#15,723
Krymsk® 5 is 85% of Mazzard, it is an excellent sweet cherry rootstock, balancing precocity and vigor for even cropping. Krymsk® 5 is an excellent choice for prolific-fruit-set varieties like, Chelan, Lapins, Sweetheart and Skeena. When you have difficult growing conditions or high yielding varieties, making Gisela and Krymsk 6 not practical, Krymsk® 5 is the root of choice.
In heavy soils, significant suckers may occur. Krymsk® 5 is sensitive to the pollen borne ILAR viruses. Krymsk® 5 appears to be less sensitive to Bacterial Canker than Gisela® 6 or Colt.
Prunus fruticosa x Prunus serrulata var. lannesiana
Sweet cherries—2000 in California, Oregon, Washington and New York.
Sweet cherries. Significant graft union over-growth can sometimes occur in some sweet cherry varieties.
85% of Mazzard seedling.
Excellent.
Good.
Between Mazzard and Gisela® 6.
Good with sweet cherry. Less flower density than Gisela® rootstocks. Crop load management needed, but less than with Gisela®. Yield efficiency with sour cherries is unknown.
Fruit ripens two days ahead of Mazzard.
Produces some trunk and root suckers. Can be excessive in heavy soils.
Appears to be higher than Mazzard.
Excellent for all but the coldest growing sites in the US.
Unknown. No problems have been encountered.
Less sensitive than Gisela® 6 or Colt.
Untested.
No problems have been encountered.
Unknown.
Very sensitive to PNRS and PDV viruses.
Good.
More tolerant to low soil moisture and high temperature stress than Gisela rootstocks.
Level of susceptibility is unknown, but not extreme.
Good. (8 to 8.5)
Unknown.
