The RHS have made great efforts to make Harlow Carr gardens as accessible as possible.
There are plenty of disabled bays close to the garden entrance and a carers is admitted free and access dogs are welcome and are free. Wheelchairs and mobility scooters can be hired without charge, but it is advisable to book these in advance.
Entry is through wide automatic doors and there is a ramp into the garden. The ticket area has some lower areas more suitable for wheelchair users. The shop, restaurant and alpine house are fully accessible.
There are accessible toilets in the entrance hall, restaurant, shop and plant centre and also near the old bath house.
The gardens occupy a large area and are on a slope. There is a network of paths around the garden mostly tarmac with a slight gravel covering. Complimentary maps are available showing the suggested routes for both mobility vehicles and push wheelchairs. This gives access to over half the garden, but the woodland and arboretum may be unsuitable due to gradients and path surfaces. This may also apply to the vegetable garden with its chipped bark paths between the raised beds.
There are plenty of seats around the gardens
There are full details in their “Access Statement”:https://www.rhs.org.uk/gardens/pdf/harlow-carr/harlow-carr-access-statement.pdf access statement.