|
| I have both a pin oak & river birch with this problem, Chlorosis (Iron deficiency)
1) The illinois soil has a good supply of iron (FeSO4) but the soil pH is 6.8 For the iron to be utilized by these trees the pH needs to be 5.5 2) I wanted to use sulfur to lower the pH but the directions say to "mix the sulfur in the top 6 inches of soil". 3) these trees are in an established lawn and the trees have a caliper of 20 inches or more 4) HOW can I incorpoirate the sulfur under these conditions? 5) There was a sugestion that if the soil pH was lowered more than 1 point it would result in tieing up nitrogen & iron ect.... is this so? 6) tried to contact the supplier of the sulfer (Fertilome) several days ago but no response. |
Follow-Up Postings:
|
| Here is an article that might answer your questions. In the short term you might try a foliar spray that contains chelated iron to help the trees. Any acidic fertilizer like Mir-Acid should do the trick, but those aren't recommended for long term use since they usually contain aluminum sulfate. I used to live in northern IL and Pin Oak is notorious for doing poorly up there. A good substitute if you ever plant any new trees is Hill's Oak (Quercus ellipsoidalis) and a good substitute for Red Maple is Freeman Maple (Acer x fremanii). I am surprised the River Birch is chlorotic as I have seen many large, healthy specimens growing in the northern parts of IL. |
Here is a link that might be useful: Iron Chlorosis
|
- Posted by albert_135 Sunset 2 or 3 (My Page) on Sat, Jun 19, 10 at 13:12
| I must assume you have already studied the University of Illinois at Urbana-Champaign article on chlorosis. I only mention it just on the off chance it was overlooked since you did not mention how you ruled out magnesium and zinc deficiencies. |
Please Note: Only registered members are able to post messages to this forum. If you are a member, please log in. If you aren't yet a member, join now!
Return to the Botany Forum
Instructions
- You must be a registered member and logged in to post messages on our forums.
- Posting is a two-step process. Once you have composed your message, you will be taken to the preview page. You will then have a chance to review the contents and make changes.
- After posting your message, you may need to refresh the forum page in order to see it.
- It is illegal to post copyrighted material without the owner's consent.
- HTML codes are allowed in the message field only.
- No advertising is allowed in any of the forums.
- If you would like to practice posting or uploading photos, please visit our Test forum.
- If you need assistance, please Contact Us and we will be happy to help.