Help, what's wrong with my fruitless mulberry tree?

newgen(9 Central California)July 14, 2010

Tree was planted 1 year ago, survived the cold winter with no issues. This past spring, lots of new leaves sprouted, tree looked good. Fast forward to now, as you can see from the 3 photos attached, the leaves near the tip of branches are green and healthy looking. The leaves towards the main trunk (old growth) all have brown areas and pale green to yellow coloration. I've no idea what's causing this condition. Any info is appreciated. I really want this tree to grow fast for some shade. Thank you!

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How are you watering the plant? How often?

Have you fertilized it, and with what?

My first guess would be build-up of 'salts" from frequent shallow watering and too much fertilizer.

    Bookmark   July 15, 2010 at 9:31AM
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nmgirl(8 S.NM)

It does look like salt burn and water stress.
Is there any mulch around the base?

    Bookmark   July 15, 2010 at 11:57AM
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newgen(9 Central California)

Ah, you guys probably nailed it.

Water: along with the lawn sprinklers, 15 minutes daily.
Fertilizer: irregular, about 3 weeks ago I sprinkled some 15-15-15 around it. Prior to that, nothing.

How do you suggest I do it from now on?
Thank you!

    Bookmark   July 15, 2010 at 2:37PM
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nmgirl(8 S.NM)

15 minutes a day isn't going to keep any tree happy for very long especially in summer.
You need to give it long slow soakings. This will give it a chance to fully hydrate,help leach excess salts in the soil and encourage the tree to put down deep roots. Can you water out at the drip line or flood the planting area? Don't water up next to the trunk, that won't help.
Since your tree is showing signs of salt burn I wouldn't give it any more fertilizer for a while. Fertilizers are salts and might aggravate the situation. Could you put some yummy compost around it instead?
Would it be possible for you post a photo of where the tree is growing? If we could see that we might could come up with more ideas.

    Bookmark   July 18, 2010 at 11:53PM
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newgen(9 Central California)

Here are the photos, let me know if you need to see more.

    Bookmark   July 19, 2010 at 11:45AM
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