killing the hordes .. is not going to make the plant look better.. you should know that ...

you just have give them a couple weeks.. to flush out ... and in the meantime.. make sure the new growth is not infested ...

based on your experience.. i will have to presume your ID was correct ... and the product you used was appropriate ....

patience is the key.. for now ...

ken

ps: btw.. you said: I used compost that we make ourselves that everything else has performed magnificently in.

===>>> does that mean.. in hanging baskets??? ... and.. have you used the plastic previously??? .. im just trying to rule out other issues ... as bugs tend to attack already stressed plants.. so what could those stresses be.. other than those you listed ...

Compost is not a good planting medium for any sort of containerized plant......and that includes hanging baskets. And the plastic lining is not advised either. The coir or cocoa fiber lining is perfectly adequate as-is. What you should fill the baskets with is a good quality potting soil formulated for container gardening. Anything else will compromise drainage from the baskets and put the plants at risk from being water-logged and suffering root rots.

If the plants are at all salvageable - and we can't say as we can't see them - then I'd suggest you replant them ASAP in proper potting soil. They will need frequent watering even in the shade - baskets dry out rapidly - and regular applications of a liquid fertilizer to keep them blooming all summer. But hold off on any fertilizing until the plants have recovered.

That sounds frustrating, so sorry. Knowing your location would help. Fuchsias don't really like high temps. I used to have them last a few months in OH before I managed to "overwater" them (before I discovered that most hanging pots hold about 1/2" of water below a recessed drain hole, which could have been ameliorated for potentially permanent plants,) but never past the first week of June here in south AL, even after alleviating any possible drainage problem. ...And if you are in UK, where potting soil is referred to as compost, that would be good to know.

While straight compost may be problematic, compost cut with perlite should not be. Depending on your area's conditions, the plastic lining may be unnecessary. Also, as Tiff mentioned, knowing your location would be good. Personally, don't usually have issues with fuschia, but that could be the result of differences in where we live.

Pictures could be useful ... particularly of the bugs in Q. If it is whitefly, horticultural oils or even a dawn dish soap solution sprayed on the plants may be helpful. (Hort oils should smother any eggs. Just make sure to spray the underside of the leaves as well.) I would not use a systemic insecticide in any case. Both bees and hummingbirds could be poisoned if you should do so.

Thanks to all for your helpful comments. We are in zone 6b in New Jersey but have had a long spell of rain and unseasonably low temps since these were planted. "Compost" is probably not the best term for the planting medium we used. It is a mixture of organic forest leaves and kitchen vegetable scraps, coffee grounds, tea bags, eggshells, etc. which has "cooked" for a few seasons then screened into black gold which we mix with a bit of pro-mix which contains some pearlite. It's not heavy and drainage is never an issue. We use it in the 75 pots we have and everything flourishes. I'm sorry I used Seven (because of the bees) but the first treatment of dormant oil didn't seem to do the trick. I used the plastic liners with holes punched in for drainage because the cocoa liners were so porous the water literally poured right through and I was worried that the plants would dry out so fast I'd have to water multiple times a day. Our 2 acres is almost fully landscaped and is so much work that this would not work. The area where the baskets are hanging on only gets about 3-4 hrs of sun throughout the day which is why I chose Fuschia. I would love to provide pics but have trouble posting from my phone which is the camera I use. I guess I'll just wait and see and if no joy, will start over with something else.