Ask a Question forum: Plumeria leaf curl/leaves turning black

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Nov 14, 2013 8:59 PM CST
Hi I live in Santa Cruz ca, zone 9 and I have a plumeria that was doing fine but now all the leaves are drooping and are turning black on the edges. On the "claw" at the top there is a white residue forming. I'm wondering if this issue is because of the cold, a nutrient problem, an insect problem, leaf rust, or all of the above(or none of the above) I'm also wondering how to proceed.. I.e building a greenhouse, organic pesticides, etc. I also am attaching photos so hopefully they show up. let me know what you all think!:)
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[Last edited by captainmorgano17 - Nov 14, 2013 9:07 PM (+)]
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Name: Calin
Weston-super-mare UK (Zone 7b)
Bulbs Lilies Plant and/or Seed Trader
Nov 15, 2013 1:45 AM CST
I am not sure about the brown spots, but the tiny white spots ON the leaves (not the residue you mention) makes me thing it may have spidermites.
I used to have some Plumerias around here (cold Romania) but I had to give them up - always infested with spidermites in summer.
Same goes for Adeniums.
Name: Hetty
Sunny Naples, Florida (Zone 10a)
Plumerias Photo Contest Winner: 2015 Charter ATP Member I was one of the first 300 contributors to the plant database! Garden Ideas: Master Level Plant Database Moderator
Forum moderator Region: Florida Cat Lover Garden Sages Cactus and Succulents Tropicals
Nov 15, 2013 3:57 AM CST
I agree plus it's about the time for them to go dormant.
Also the brown edges could point to some fertilizer imbalance. In spring I would repot this plant in a new fresh well-draining mix.
Name: tarev
San Joaquin County, CA (Zone 9b)
Always count your blessings in life
Region: California Houseplants Plays in the sandbox Orchids Plant Lover: Loves 'em all! Composter
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Nov 19, 2013 2:06 PM CST
Your plumie is feeling cold already, sleep time..I would move it indoors now. I have moved mine 2 weeks ago. Our NorCal weather is getting too cold for it already. You may want to spray insecticidal soap or neem oil to remove those white could be powdery mildew or mealy bugs.

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