asaf B.
Google
Perfect visit for the open space, we'll maintained gardens combined with the modern history of Israel (well, compared to the rich history of the land, I'd say late 18th-20th century is modern:)
It's 30nis for private car, so best to join and not drive each with thier own car. There is the site website which gives lots of info about the gardens and the connection and history to Baron Rothchild, which is buried in the gardens center. The trail is well paved and will fit anyone including wheelchairs.
There are organised toilets at the entrance and water fountains inside.
No pets or food allowed in the fardes, but yes to the outer trails. These are memorial living gardens and not picnic area.
Outside the gardens there are trails which are also great to hike and some take you westward to amazing views over the Mediterranean.
You can spend half a day mixing a hike to the cliff and then the quite pastoral gardens + coffee break or breakfast at the dairy restaurant there.
Great with kids too, perfect for couples and a must place if you stay in Zichron Yakov (or if you want to have a day tour to this area - then Ramat Handiv, then Zichron and throw in a visit to one of many good wineries in the area).
Note, there are openings hours, it's not open all the time.
I think it's best visited toward late winter- spring as the gardens are at thier best. But there is lots of trees and shade so also during summer.
The outer trails - they do not have shade so hot summer days is less advised.
The whole place is very well managed and there is a usefull information point near the entrance at the parking lot with maps etc.