We came here the weekend of April 23 2016. The dumb thing was we had purchased the tickets for both Bio Dome & Botanical Garden (Individual tickets $19 or $34 for both) at the same time. Turns out no one was checking for tickets when we arrived at the garden. Mostly because nothing had bloomed yet. It will be so beautiful in the warm summer months (late May to early Sept).
The garden is absolutely serene and stunning even though nothing was out yet. My favourite was likely the Chinese garden.
They finally scanned our tickets when we got inside the building to look at the green house plants. The area was a little tight and those who do not have the courtesy to move over to the side while admiring the plants held up the line. That was my major pet peeve. Loved the butterfly garden.