I dont know how big the garden is
Suggestion you can employ a gardener to do a "big garden clear up" twice a year. Normally gardener will provide quote for one days work to cut hedges before spring and autumn & tidy. This includes taking away the rubbish in van to the correct point of disposal
If it regular small gardening like cutting grass and dead heading, tidy I would source a local friend, neighbour, volunteer, scouts, or pay a gardener
I visit friends and family and often get asked to do a variety of "jobs" eg gardening, painting, DIY, cooking, cleaning, driving
I have never charged for my time and have been happy to help
I do normally say when I am available
However, on occassion I have said NO, I do have limits