rootstock on wet ground

[leexrayshady]

came accross this snippet on g30 rootstock

G30 (semi-vigorous)Medium: 10ft - 12ft10ft-12ft apartBush
Large cordon
Small fan or EspalierG30 is an adaptable, precocious, and productive new rootstock. It produces a tree somewhat larger than M26, similar to M7, and much heavier-cropping than either. It has good fireblight resistance. G30 is very well anchored but nevertheless permanent staking or support is essential for trees on this rootstock, because of the weight of apples it can produce which on some varieties can over-stress the graft union. Probably the best rootstock of any size class if your ground is subject to flooding.

 

[wiscwhip]

Is it hardy in Zones 3/4?

 

[leexrayshady]

yep supposed to be very winer hardy

 

[wiscwhip]

If they are worried about the graft union, would this be one of those trees that could just be grown out from the rootstock? I wonder if there is any info on drop times and apple size for the G30 rootstock trees, similar to the B118 rootstock trees in the other thread?

 

[chickenlittle]

From what I've read, the Geneva series tend to be 5 to 6.5ft tall after 7 years. More shrub than tree. Here are photos of a7 year old tree and fruit. Obviously they did not prune it.

Http://www.collectionscanada.gc.ca/...c.ca/kentville/pubs/fact01-01/g30/index_e.htm

 

[Honker]

I seem to remember Ben Harper saying that Polish 18 (P18) rootstock might work well in moist soils also. I haven't seen exactly how hardy it is. It might be worth a look.

Dipper don't you have some of these?

 

[chickenlittle]

A Penn State Extension webpage says P18 is probably better on wet soils but does not cite where the info came from. They also say P.18 is about MM.111 size where most others I've seen put it at full size.
http://extension.psu.edu/plants/tre...ion/cultivars-and-rootstocks/apple-rootstocks

 

[chickenlittle]

Raintree suggests native western crabapple for wet sites. A quick search found some saying it is hardy to zone 3 or 4.
http://www.raintreenursery.com/Malus-Fusca-Wild-Crabapple.html

 

[sandbur]

I saw a link on the Rum River QDMA facebook page that dolgo does OK in wet ground. I have heard that from a board member of our MDHA chapter and decided to try some dolgo.

Lee-what compatibility issues did you have with dolgo?