If you are interested in plants and want to escape the crowds, this is a good place to go. The gardens are divided up into geographical zones. Most plants are well labelled and main points have information about them in Spanish, Catalan and English.
It’s on a hill, but concrete paths make it accessible for wheelchair use although you’ll need a very energetic pusher!
The temporary exhibition about bees was very interesting. There are good views over the whole city.
There is not much shade if you need to avoid the sun in the hotter months, but there are plenty of drinking water points dotted around. HOWEVER, this location is really lacking in toilets. There are some at the entrance (not clean enough, but…) but the others, at the other extremity of the gardens, were closed when we visited. It also really needs a decent cafe / shop. There are just vending machines for drinks / snacks. It’s a great opportunity missed as the location cries out for them and lack of them is a downer at the end of what otherwise could be a fabulous visit.