I will be travelling from Bruges to Delft on Wednesday, June 17th, with stops in Antwerp, Kalmthout (at the Kalmthout Arboretum), and Rotterdam.  The exact itinerary is as follows:
  8:57 AM Leave Bruges for Antwerp
10:30 AM Arrive in Antwerp and take self-guided city walk, including Botanical Garden and Cathedral of Our Lady
12:23 PM Leave Antwerp for Arboretum Kalmthout 
12:44 PM Arrive at Arboretum Kalmthout 
  2:19 PM Leave Arboretum Kalmthout for Rotterdam 
  3:19 PM Arrive in Rotterdam
  4:00 PM Visit Trompenburg Tuinen and Arboretum
  5:00 PM Leave Rotterdam for Delft
  5:15 PM Arrive in Delft
How many rail tickets do I need to buy for this journey? Can they all be purchased at the Bruges station?
Thanks.