Old leaves of Chinese Elm bonsai have gone brown at the edge and yellow at the center and then falling off

Asked May 21 '19 at 08:17

Active May 21 '19 at 08:17

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I have a 7 year old Chinese Elm bonsai. So far it has been growing new shoots without any problems. As of last week I noticed most of the leaves of the old shoots have started going yellow at the center and brown at the tip. After a while they become crispy and fall of the tree. It only seems to affect old shoots, as far as I can tell all the new shoots look normal to me. I’ve attached a picture for reference.

I normally wait until the soil looks dry (it changes color) before giving it a thorough watering.

Is this natural? Or could this be caused by overwatering? Under watering? Over fertilizing? What should I do?

I’ve also noticed a thin layer of white crust forming on top of the soil.

asked May 21 '19 at 08:17

Danny Bravo

For me it is fertilizing or pH. Note that some component in fertilizers inhibits other components. Could you write more about what fertilizer and how often you do it? – Giacomo Catenazzi May 21 '19 at 10:46
I am using Pokon Bonsai plantfood. Mixing 2.5ml into a 500ml bottle and watering with the bottle once every week or so. – Danny Bravo May 21 '19 at 15:24
Where is the tree kept? Inside / outside? – AvieRose Jun 24 '19 at 19:35
@AvieRose It's kept inside. – Danny Bravo Jun 26 '19 at 06:40

Old leaves of Chinese Elm bonsai have gone brown at the edge and yellow at the center and then falling off

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