Most of my gardens are adjacent to concrete retaining walls (see pic).
This is only my second year of in-ground gardening. All my experience is in container-gardening with store-bought soil, so I never thought much about soil chemistry.
I haven't had the soil tested yet, but I'm concerned that their less-than-stellar performance may be due high ph levels. I'm thinking I should apply fertilizer that is designed for acid-loving plants in order to balance out the soil chemistry - but I also have a heap of compost available. (Also a new thing for me).
So I'm wondering if there is anything I should know about composting that might impact the need or desirability of fertilizer (especially a fertilizer to increase acidity?)
- my concrete garden