Q.Advice please, about my two year old, peonies that were started as bulbs and have been in beds for two years now. Loads of lush green
leaves this year, even from the ones from M and S as bulbs I planted in pots only a few months ago! According to a video I saw online put out by Thompson seed company, mine are not planted too deep!!!! Unsure how much of above line has been taken!!!! Anyway, I know some peonies could be in shade of trees but others have direct sunlight, so I am clueless why they have not flowered so far? What feed should I be applying to them please? Any tips would be fantastic.
Also I have some more I have temporarily put in pots that were sale purchases at the end of this season. Can I dig these in the ground now and just not water them at all, although they would not be very deep in the soil is my dilemma?
Another question is. I just kill off every small lavender plant i buy!!!I am seriously wondering now if these are too small to get going realistically when I buy them from say Waitrose or Lidl around £3.50 a pot? I reckon a much bigger plant in a pot from a shop would be stronger and less likely to die within first few months, do you agree with this? Thanks a lot for your help. Linda. Tel. 01189 733131 if easier than email for response.

It is likely that your peonies have too much nitrogen present in the soil. You can counter this with fertilizers high in phosphorus and potassium. I am not familiar with the climate in your country, but it sounds like it is fine, since they are growing vigorously.
As for the lavender... You may need to plant it into a larger container, and let it live its first year of life there before you transplant.
These two articles will help:
https://www.gardeningknowhow.com/edible/herbs/lavender/growing-lavender-in-pots.htm
https://www.gardeningknowhow.com/ornamental/flowers/peony/why-your-peony-buds-but-never-flowers.htm