French marigolds to see off conservatory green fly

Several years ago I got greenfly in the conservatory and couldn't get rid of them until I tried french marigolds which worked like a charm. Now every year I buy a strip of 6 french marigolds and put 2 or 3 in the conservatory and the rest in the garden where the slugs eat them. This year in B&Q and Homebase they only had sets of 12 marigolds for sale, and giving up 9 or 10 marigolds for slug food seemed a bit much. I didn't buy any, hoping that not having had any greenfly in the conservatory for years would mean for a year at least I would be OK. Then last weekend I had taken some puppetry books I no longer wanted for the Puppet and Toy Theatre Guild stall at the May Fayre at the Actors Church in Covent Garden (every year lots of Punch & Judy Professrs come to this "fayre" to celebrate the first recorded sighting of Punch in England - in Pepys' diary). On a residents association plant stall were some french marigolds, so I brough 2 at £2 each. This was about the price of 12 at the DIY store, but it was money for a good cause and no waste so I didn't mind. I put them in a small planter today. I also put the mint into a slightly bigger plot. Was pleased to see 2 bumblebees feeding from my wysteria.

Wisty Wisteria

I've seen wisteria out in gardens elsewhere the past fortnight, but only now is my wisteria is out. I've a north facing garden, so that is probably the reason. I have the bush behind the shed:

For several years now I've trained it along the fence:

In the middle of last year I decided to let it continue up my neighbour's ash tree, as the wisteria flowers before the ash comes into leaf. It has reached half way up the tree, but no flowers this year. Next year I hope to have an ash tree full of bloom. Wisteria are supposed to be good for insects, but I've never seen any feeding from the flowers.