Hibiscus: Opinions please..., 0 by MacFL

MacFL wrote:
G'day ecrane3! (Wish I knew how to address you a little more cordially, considering you graciously answer all of my posts for help - haha).

As requested, here is a photo of the bottom of a leaf showing the whitish film. I got to thinking after my post, could the white film be dried neem oil? I sprayed the plants about a week ago for posterity sake and for leaf shine, so maybe the film is old neem that didn't drip off? I haven't tried to wipe it off yet, so I don't know if it comes off easily. I will check today.

I think the tiny green bug I saw yesterday must have JUST landed on the plant. It was sitting on the flower itself and not on a leaf, and my understanding is, Aphids hang out on leaves not the flowers. I also have seen a few ants crawling on the flowers which may mean have been around at some point.

Here's the underbelly of the leaf. Let me know what ya think. I haven't seen anything on the new growth areas or flower buds before they open.

Do you have any Hibiscus in your garden? Do you know if the 1cup of white vinegar to 1 gallon of water poured on the soil at the base of the tree helps the yellowing of leaves? (Read this online and the theory is it boosts the acidity of the plant and thus reduces yellowing of the leaves).

Whatcha think?

Thanks for being my personal sounding board for my rookie gardening! Much appreciated! :)

Cheers!

Mac