[NAFEX] Krymsk-1 Prunus rootstock

R F Hollaus hollaus at comcast.net
Thu Apr 7 12:48:34 EDT 2011

Hi Jerry,

I have Zaiger's patented z-stem scions dormant in the fridge. They are patented so I'm rather careful using these. I am using them to graft on cherry rootstocks and then plum on top. The patent describes using them on citation rootstocks and then growing cherry trees but I have found the z-stem themselves to be bushier on cherry roots. 

Because of the patent it's probably best to keep it quiet, so -shh, or zaiger might have some authority to take them away from here. (I'm not selling, just experimenting for myself)

The short of it is I would be interested to find out if krymsk-1 will do a better job then citation under all this for cherries. I would be willing to try some if you have any left to see how it would work for me for cherry. 

By the way the z-stem is prunus cerasifera.


----- Jwlehman at aol.com wrote:
> In a message dated 4/7/2011 7:20:14 AM Eastern Daylight Time, 
> sam.brungardt at state.mn.us writes:
> > I have some trees on Krymsk 1 that are about five years old.  It has been 
> > doing fine but I would say more than 50% dwarfing if anything - it is a 
> > serious size reducer and its been hard for me to adapt to since I am not used 
> > to so much dwarfing in stone fruits.  I have only used it on apricots and 
> > plums.
> > 
> > Scott
> The experience with VVA-1 and dwarfing varies from species to species 
> grafted to it. Even variety to variety. Reports I see seem to indicate it is more 
> dwarfing for plums and apricots than peaches. Received a call this morning 
> from a very knowledgeable grower and NAFEX member that reported on some 
> peaches it are only about 80% dwarfing.
> I would expect soils to make a difference also. 
> The current issue of "Journal of the American Pomological Society"  Has a 
> report of the NC-140 Peach rootstock trials. The NC-140 trails is a joint 
> University researcn project using 17 sites and over 10 rootstock varieties 
> including Krymsk 1 & 2. Peaches used were: Redtop, Cresthaven and Redhaven. The 
> published results are from 2002 to 2006. 
> I'm extracting two sentences from the report. 
> " Two of the rootstocks, Pumiselect and Krymsk-2 exhibited many problems 
> with survival, computability, suckering and fruit size"    
> "Krymsk-1 shows a tendency to have slightly higher cropping efficiency than 
> the other rootstocks." 
> My summation, all things considered, peaches on Krymsk-1 did very well. 
> This limited number of liners is made available to NAFEX and INGA members for 
> back yard growers to test.  
> Jerry 
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