Sounds like the little spiders that cause the leaves to contract underneath from some of my beginning research as I try to save my hibiscus. One of my hibiscus had that, and the insecticide soap (Safers) in Ontario did nothing. I have bought ladybugs, and am releasing them at night under the plants. My hibiscus concerns will be posed on a different posting.

This happened to one of mine earlier this year; it was a result of my application of fungicide at the wrong time of day. I was in the process of applying Bayer Advanced Disease control one morning & got stopped halfway through my chore. When I went back outside, it was 10 am & the last rose I sprayed had too much direct sunlight. The foliage & buds that faced south, where there was the greatest sun exposure, shriveled & looked a little hinky. The other roses & the backside (shaded side) of that last rose looked perfectly fine. Learned my lesson! ---Laura

So could it be lack of sun? Avocados love sun and water. Or could it be some lack of nutrients or a pest? I've never seen this curling thing on mine, so can't answer, but maybe this will encourage others to chime in. When our citrus leaves curl, it's due to leaf miners. They don't hurt the plant but sure make it ugly.

Late frosts are indeed killers. Roses that looked the picture of survivability, with plenty of healthy green canes that survived the winter can be cut back to the ground by a spring frost, after breaking dormancy with good new growth emerging forth. The length of the frost and the low temps reached are critical factors. Also, come early spring apparently nice green canes sprouting new growth can suddenly begin to decline and die back, turning black, without any contributory frosts after dormancy break to cause the calamity. What has occurred is these canes were actually severely damaged at some point during the winter and just have not shown it until now. I breath a sigh of disbelief when after spring pruning to nice live looking, rich green, white pithed canes, some of these visually very much alive looking canes soon turn black and die back, often to the ground. No late frosts were involved at all. These canes were doomed to die, but didn't show it at first. You may get new good growth from below ground. Give them some more time. If by June, there's no evidence of life, then dig them out. Moses