Does anyone know how much more resistant to aphids G890 is compared to 30? I am looking for a more bullet proof rootstock for my mother in laws front yard in NC, so resistances are key. It’s a sandy loam yard. G890 looked intriguing from the description, she wants a vigorous crabapple, while I am terrified she’s going to either break her neck maintaining it or make me do it. Her current apple has been almost girdled by something, as a feathered whip, so I figured starting it over with a very good rootstock for our area was worth it.
Does anyone know who sells 890 anyway?