old bulbs / tubers

I have been slowly re-doing the garden of my 3 year old purchase in Queensland and I have noticied that the previous owners have put what I think are either Clivia or Hippiastrums around the place that I have never seen flower - I thought it may have been because they have been choked for so long I thought once I cleared it out they would flower next year...well i'ts next year and none of them look like they are - so my question is, what can I do to encourage them to flower? They get watered and they are not completely in the sun, and they are mulched quite well. Any suggestions?
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
Add image file

HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.