Osmanthus fragrans - why is some new growth turning brown?
I'm stumped! A few (but not all!) of the newly-emerging leaves on my sweet olive (Osmanthus fragrans) are turning brown and shriveling. Click here to see what it looks like (opens in new window).
This only started a few days ago. Otherwise, the plant looks healthy, other than a few scorched old leaves from back in June when we hit 112. I looked real close but didn't see any bugs. What could it be?
(Tried googling -- but all I can find are similar problems in marijuana plants! LOL! And the few O.fragrans "brown leaf" posts I've found on this site all involve older leaves, not new growth.)
Current growing conditions:
- Direct sun 10am to 3pm - otherwise shaded by house and wall
- Daytime highs currently averaging mid-90's to low 100's, with 40-60% humidity (monsoon season; normally it would be hotter and drier)
- Watering 2x week for about 20 minutes if no rain. Rained like crazy 2 days ago!
- Mulched with 3 inches of mesquite leaves and detritus
- NO fertilizer - but I did put down 1/2 cup of cottonseed meal earlier this year
- Planted last October
- Applied Dominion systemic (Imadacloprid) last March to control thrips
Anybody experienced something similar? The link below has more pictures.
Here is a link that might be useful: More Osmanthus pics