I'm a decent amateur gardener rethinking my life. I work part time now (4 days a week, term time only) but would love to work in gardens. I'm thinking to start fairly soon doing gardening for old people on my one spare day - mowing lawns, edging, weeding etc but ultimately it'd be great to be able to plan planting schemes and design, potentially full time(ish). I know a reasonable amount through trial and error in my own tiny garden but am thinking I need to get some proper qualifications of some kind if I'd like to make career of it. (I had another thread in Chat to see if any of this seems like a good idea).
There's quite a range of courses - RHS, City & Guilds etc. I think I'd probably need to do distance learning unless I could find an evening course locally (which seems unlikely). Does anyone have any experience of any of these or anything else I've not thought of?