If you ask for an Orchid garden to visit in Funchal, often Quinta da Boa Vista or Boa Vista Orchids (same place) is mentioned. In their exhibition you will find many nice orchids and some you can buy as well.
According to their web site this is the best orchid exhibition in Funchal all year around with thousands of different varieties on display. Try it to find out yourself.
You can also enjoy the associated garden with many exotic plants that varies during the year. Something is always blooming.
Of course it is possible to buy orchids and other exotic plants which they grow, on site or by mail-order through their Facebook site.
Quinta da Boa Vista
Rua Lombo da Boa Vista
Opening hours: Monday - Saturday 09:00 - 17:30
Entrance: EUR 2.50 - 4.50 (depending of season).