Fons would certainly have a better opinion but looking at the picture, you seem to have a fairly "normal" ground from a PH perspective, at least if I compare with what I see in my own garden. One specificity though is with the aegopodium, which you seem to have a lot. It is normally indicative of a certain level of moisture. It means also it will be a pain to replace with something else, unless you spend a good amount of time removing all the roots by hand.
Additional information that would be useful:
- pictures of the neighbouring plots
- what is the white rectangle on the last picture? A gutter? If yes, it would explain the aegopodium with, maybe, the location at the corner if water flows this way
- how much time do you want to put in caring for the ground?
- for my own information, I’d like to understand what animal is making the tracks in the aegopodium?
A few advices anyway:
- Your Heracleum is different from those in my garden but I pay attention to cut the seeds before maturity. It can be really invasive, although aegopodium is a tough competitor
- Get the “How to Make a Wildlife garden”, from Chris Baines. Lots of very useful information for such projects.
- At home, I’ve chosen for the “wildlife feeding station concept” which I got from Chris Baines. On 30 square meters, you can implement it for birds, bees, butterflies…
- I would personally go for a meadow (which one is open to discussion: floral, dry, wet, calcareous, …) or for a wood edge. Both as a feeding station.
- You could also have a few bushes, carefully selected for pollen, nectar and fruits accross the year. It would feed insects in spring and automn and birds in winter, for exemple Lonicera fragantissima, Buxus, Rosa canina, Sambucus nigra, Hedera helix arborescens. Except Sambucus, which is very easily pruned yearly, they all stay under 2 meter height.
- If you have a gutter, you could do a great wet meadow by keeping it as it is and introducing Valeriana officinalis, Symphytum, Filipendula ulmaria, Lythrum salicaria, Alium ursinum ... and have a bee paradise