ladybird larvae - Anyone had success controlling Aphids with them?

Just noticed that my Rose bush is covered in greenfly. It will only be a matter of time before they notice my Tomato and chilli plants .

I have tried sprays and washing up liquid in the past to no avail. Just wondering if anyone has had any success with the packs of 50 ladybird larvae you can buy online? We have a few big sycamore trees at the end of the garden that are always full of greenfly, so if I released them into that it should get a nice little colony of them going shouldn't it?

They cost £15 for 50, so really expensive, but i it works I don't mind.

TIA

Plant some plants like marigolds, calendula, poached egg plant, & tagetes near the plants that have the aphids, you bring in insects like hoverflies, ladybirds, etc which like the aphids.
Use to plant a lot of these plants around my veg garden some years ago.
If you use washing up liquid, you need to mix at the correct does otherwise you can kill the plant.
Around a teaspoon of washing up liquid to a gallon of water was what I used on the broad beans,
I found it worked fairly well.

Just been reading up on greenfly, they now recommend adding Tablespoon of Canola Oil (Rapeseed Oil) / Olive Oil to the washing up solution now, improves the results.

Thanks, I will try that first then as £15 is a lot to drop on a box of insects.

It's strange the I don't see any Ladybirds around here any more. There used to be loads years ago, but I never see them now. I'll look into the plants you mentioned as that could be one reason why there is none.

Going to have to buy some sort of chemical spray first as I have also noticed there is black spot on the plant .

EDIT: Is Canola oil rapeseed oil? Gonna try some diy sprays before buying chemicals. Apparently baking soda helps control blackspot. So could put the washing up liquid in as well to get rid of the greenfly.

Sorry Yes, it's Rapeseed Oil, I'm old enough to remember Mazola Canola oil., Canola was a trade name I think.

The wet & cold weather hasn't help the ladybird this year, only seen two or three so far.

When I planted marigolds around my cabbages, I never suffered from cabbage white butterfly damage.