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["Lon J. Rombough" <lonrom@hevanet.com>]

I have an old variety that I believe to be one of the old Burbank hybrids.  I use the "name" 4285 for the address where I found it.  The traits of the tree make it look like some sort of old Santa Rosa hybrid with one or more American species.  The original tree was of an age that suggest it came from the old Oregon Nursery Company.  It has a growth habit suggestive of an American hybrid, but is much more resistant than other American hybrids like Superior, Toka, etc. I've tried here.  It has failed to crop only once in over 35 years.  Even in years when Japanese plums were a total loss, it came through.  The only other variety that has done as well is Shiro.   The trees of the two are similar, though Shiro will get some brown rot when 4285 is clean.  The plums are reddish-blue with yellow-orange flesh.   Crops are not heavy, but the trees I have are own rooted.  4285 might do better on something like Pixy rootstock.  
-Lon Rombough
Grapes, writing, consulting, my book, The Grape Grower, at http://www.bunchgrapes.com  Winner of the Garden Writers Association "Best Talent in Writing" award for 2003. 
For even more grape lessons, go to  http://www.grapeschool.com
For all other things grape,   http://www.vitisearch.com

On Nov 25, 2007, at 6:56 PM, Scott Smith wrote:

To follow up on this question I had asked earlier, I checked out the  
"plum files" from the NAFEX library and found some good information.   
The Southern Plum group was active in the early 90's and several  
reports from that group were in the files.

- One surprise is that the Sprite cherry-plum cross does well in hot  
and humid climates.  After my bad luck with pluots I did not even  
think about trying that one, but it gets quite a few kudos.  I think  
I will try it, but it may bloom too early for me.

- I did not find any standout recommendations for the AU series plums  
or the new Georgia plums.  AU Producer was liked by some, but on the  
other hand it got the lowest rating in a taste test in a 1993  
article.  Rubysweet received the highest score in the taste test.   
That is the one new AU or Georgia plum I plan to try.

- There were differing opinions on how disease-susceptible Methley  
is.  One person and one study found it bad but another study found it  
not so bad at all.  I may give good old Methley a try in the end,  
perhaps the samples I have tried were not grown or harvested properly.

- Not many of the southern growers tested the northern hardy plums.   
Since they are also native hybrids with more disease resistance I  
would think they were worthy of trial.  I did find one good report of  
Purple Heart from a grower in Mississippi.  I am trialing several  
northern hardy plums right now, and am going to add a few more of them.

- There were many confirmations of how poorly the pure saliciana  
(Japanese) plums do in the south due to diseases.

Scott
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