Hubby, 13 year old son and I all spent a great hour and a half here. We experienced a fascinating educational tour about harvesting and processing olives, lavender and figs, a small museum, a sizeable garden with hundreds of individually named edible plants, a cafe and shop. The gift shop is amazing as there are many opportunities to try free samples of the excellent wide range of foods which our teenager was really enthusiastic about. I'm not a keen shopper anywhere but even I couldn't stop myself buying a bag full of goodies to take home despite there being no pressure from staff to make a purchase.
If travelling by bus, there are a range of options which Google Maps shows. We arrived by number 22 bus from Split which passes both the Klis fortress and the olive museum. As the 22 buses are infrequent, we took the number 80 bus back to Split. Walking between the fortress and the Olive Museum is just over a mile and there is a choice of two roads, with the higher one being more of a stony track with no traffic but better views.