problem with tropical hibiscus

judomi(L.I. NY)August 28, 2007

I have a tropical hibiscus. Last year it bloomed well. This year it hasn't bloomed at all. There is a problem with some of the leaves. They are turning yellow, then brown, and then they shrivel up. Does anyone have any idea what's causing that?

Thank you for reporting this comment. Undo
beachbarbie(z9a/8b NC)

Is the problem on one stalk - as in, part of the plant is affected, while the rest is healthy? If so, it maybe a fungus. In which case, you'll need to cut off all of the affected parts and repot with fresh soil.

    Bookmark   September 2, 2007 at 8:59PM
Thank you for reporting this comment. Undo

I found some great sites online that talked about the many diseases that these plants can get.

These are the sites - they give a lot of detail about care for your hibiscus.

    Bookmark   September 3, 2007 at 3:28PM
Thank you for reporting this comment. Undo
judomi(L.I. NY)

The hibiscus is grown as a standard. The leaves that are turning are on different branches. What's confusing me is that it's getting new leaves on the same branch and they are fine, but some of the older ones are turning yellow. I moved the hibiscus to a closed in porch where it has better lighting, and although it's getting a lot of new leaves, some of the older ones are still getting yellow. The plant as a whole looks healthy.
I checked out the sites that were suggested, but couldn't find any information about the leaves turning yellow.
I've also noticed some gray spots on some of the older leaves.

    Bookmark   September 9, 2007 at 3:36PM
Thank you for reporting this comment. Undo

Gray spots could be powdery mildew, but you didn't say if they were on the leaves when they started to yellow or if they appeared after they yellowed. If before, the mildew would indicate too much moisture on the leaves, if after, the leaves are just decomposing.

Always water from below and try to avoid getting the leaves wet in the evening. I like to water in the morning so the moisture has a chance to dry off during the day. Also, when the plant dries off during the day, the sun kills the spores that cause the mildew. The mold and mildew spores are in the soil and in the air, so you can hardly avoid getting them on the plant's leaves.

The only other thing I can think of, is that leaves don't live forever and maybe your plant just needs fresh foliage. I don't really have much experience with hibiscus, but I do know that sometimes a perfectly healthy plant just drops leaves. Since your plant is putting on new growth, it's probably OK.

I have one hibiscus and it dropped about 10 leaves when I transplanted it after bringing it home from the nursery. But it has been doing fine and put on many new leaves since then. I didn't look at the dead leaves closely to see if they had any sign of disease, but I did remove them from the plant and the area to avoid the possiblity of spreading diseases on them. This is a standard practice I use with my roses, which are very prone to disease, molds, mildew, fungus and pests. And I do have a lot of roses. Cheryl

    Bookmark   September 10, 2007 at 4:34PM
Thank you for reporting this comment. Undo
judomi(L.I. NY)

Some of the leaves that had the gray were not yellow, some of the others had grey spots and yellowing, others were just yellowing. I took all the discolored leaves off.
I also read that it could be a nutrition problem.

Does any one know the name of a name brand fertilizer that has low phosporus? I'm trying to find the right fertilizer for my tropical hibiscus. The ratio numbers are 9-3-13, 10-4-12, and 12-4-18.I've tried a few nursery departments but I haven't found it.

    Bookmark   September 10, 2007 at 8:12PM
Thank you for reporting this comment. Undo
hitexplanter(8 a)

Look for Carl Poole or Diamond brands as two options. Even miracle gro has a 4-1-2 all purpose soluable that can be used and is probably more commonly available. Peter's I believe has a 3-1-2 ratiod fert as well. Overall I am not too concerned with the brand but the ratio and other micros it has in it. The Carl Poole is the best overall in all types that I have found so far and is what I used last year and am still using this year and am happy with the results.

    Bookmark   September 10, 2007 at 8:21PM
Sign Up to comment
More Discussions
Searching for Hibiscus Bloom Holder
I'm looking for a glass tabletop "vase" designed...
Is my hibiscus dead?
I bought 2 hibicuses last year, and they did wonderfully....
Main stem brittle, dark brown and withered but the Roots are ...
Hi. So my the stems of my hibiscus have all withered,...
Hibiscus from cuttings ??
I was lucky to obtain a cutting from a lovely yellow...
Country Sunflower
Abelmoschus Manihot problem
I have a question about my Abelmoschus Manihot. I've...
Sponsored Products
Juno Under Cabinet Lighting Pro-Series 14 in. Xenon Brushed Bronze Under
$83.97 | Home Depot
Casdon Kids Play Hetty Cleaning Trolley - 631
$23.20 | Hayneedle
RGB-pixelpro-bullet-8 RGB PixelPro LED Bullet
Juno Lighting Hardware Pro-Series Black Direct Wire Module ULH-DWM-BL
$17.97 | Home Depot
Alexandra Outdoor Urn Pedestal Table - IVORY
$995.00 | Horchow
Naturally Cooling Ceramic Ice Bucket and Tongs by Magisso
$90.00 | Lumens
Ice Blue Spatula
$6.99 | zulily
Comfort Dreams 13-inch King-size Gel Memory Foam Mattress with Thermo-Gel Cover
People viewed this after searching for:
© 2015 Houzz Inc. Houzz® The new way to design your home™