| Author |
Message |
wellington
Joined: 21 Nov 2009
Posts: 9
Location: N. Phoenix
|
| Posted: Tue 14 Jun, 2011 10:11 pm |
|
Where exactly does the rootstock end and the graft start? A few of my trees were frozen down to the graft this winter and some of the new growth is coming out of the graft union (bulge or elbow as I refer to it).
I know everything growing above the union is good and everything below is rootstock. Sorry I'm new to this. Here are some pics if that helps.
 |
|
| Back to top |
|
 |
gdbanks
Citruholic
Joined: 08 May 2008
Posts: 251
Location: Jersey Village, TX
|
|
| Back to top |
|
|
wellington
Joined: 21 Nov 2009
Posts: 9
Location: N. Phoenix
|
| Posted: Wed 15 Jun, 2011 12:31 pm |
|
| gdbanks wrote: | | do you know what kind of root stock that is? |
I was told it is Citrange C-35. I bought these from a mass grower out here in AZ and I believe that is the most common. |
|
| Back to top |
|
|
camo_hunter
Citruholic
Joined: 10 Mar 2011
Posts: 82
Location: Wayne Co. Georgia Zn8
|
| Posted: Wed 15 Jun, 2011 1:36 pm |
|
None of those sprouts are from the C-35 rootstock. C-35 has a Trifoliate leaf. |
|
| Back to top |
|
|
Millet
Citruholic
Joined: 13 Nov 2005
Posts: 6657
Location: Colorado
|
| Posted: Wed 15 Jun, 2011 5:19 pm |
|
Growth is apparently regenerating from the scion. - Millet (578-) |
|
| Back to top |
|
|
pagnr
Citrus Guru
Joined: 23 Aug 2008
Posts: 407
Location: Australia
|
| Posted: Wed 15 Jun, 2011 10:41 pm |
|
What variety was the original tree?
Those sprouts look like grapefruit, or one of it's relatives. As others said, it's not Citrange and seems to be from the scion, but hard to tell because of the whitewash on the trunk.
The big petiole could also be from a sour orange type rootstock. |
|
| Back to top |
|
|
wellington
Joined: 21 Nov 2009
Posts: 9
Location: N. Phoenix
|
| Posted: Wed 15 Jun, 2011 11:17 pm |
|
Thank you for your help. I guess I was looking for a hard and fast rule about growth on the scion-rootstock joint.
I'm taking you need to investigate each new growth and identify. |
|
| Back to top |
|
|
wellington
Joined: 21 Nov 2009
Posts: 9
Location: N. Phoenix
|
| Posted: Wed 15 Jun, 2011 11:32 pm |
|
| pagnr wrote: | What variety was the original tree?
Those sprouts look like grapefruit, or one of it's relatives. As others said, it's not Citrange and seems to be from the scion, but hard to tell because of the whitewash on the trunk.
The big petiole could also be from a sour orange type rootstock. |
I believe these were actually both grapefruit. I just had these pics readily available on my pc. I'll go back out and take some pics with the exact type of scion, including some oranges with the same issue. I bought these at a mass producer in phoenix and was told they should be C-35. I believe I even asked about sour orange and was told they don't use it. They said the size the sour orange is too big to be used in houses with HOA's.
On a side note, I have a few acres and wanted to try to grow some trees on sour orange. So I went out the the ASU/U of A Citrus co-op and started a few trees by seed. They are about 5 inches now but I'm worrying about the heat. Hopefully, I can keep them alive and eventually give a try at grafting. |
|
| Back to top |
|
|
pagnr
Citrus Guru
Joined: 23 Aug 2008
Posts: 407
Location: Australia
|
| Posted: Thu 16 Jun, 2011 1:17 am |
|
Wellington, in your first photo, starting from ground level, you can see a vertical split in the bark of the stock. Between the top of the split and the sprouts, you can see a thin line right across the trunk, that dips down. That is probably the graft union. above and below that line, the bark texture is slightly different, but it is hard to tell because of the trunk whitewash.
In most cases the stock and scion will have different color bark, making the union easier to see. It looks like the sprouts are coming from above the graft union line, so they should be the original scion variety. |
|
| Back to top |
|
|
David.
Citruholic
Joined: 09 Nov 2009
Posts: 400
Location: San Benito , Texas
|
| Posted: Thu 16 Jun, 2011 4:48 am |
|
Its either grapefruit or sour orange with that large petiol on there. On another note sour orange with stands 100+ weather with no issues and takes drought extremely well.
_________________
South Texas gardener |
|
| Back to top |
|
|
citrange
Site Admin
Joined: 24 Nov 2005
Posts: 590
Location: UK - 15 miles west of London
|
| Posted: Fri 17 Jun, 2011 5:07 pm |
|
If those leaves are from the scion variety rather than the rootstock, then it would seem that the graft point is buried and the whole tree has been planted too low in the ground. That could also explain why it is so difficult to see where the graft point is.
The thin horizontal line in the first photo looks to me like the point where the wood changes from live to dead. Sometimes, a definite boundary line shows. Above the line, scratching the surface will show no green, below the line it will. |
|
| Back to top |
|
|
