I have been growing Heli from Wistuba since 1997 but have found some clones (for me at least) never progress well. My hispida never did and got smaller. Yet another clone from elsewhere moved to adult growth quickly. My 10 year plus elongata is tiny and just produces endless offshoots which I eventually split off. But none go beyond the tiny juvenile stage. The same with my neblinae x hispida. And a recently purchased parva which had two adult pitchers but had reverted back to small juvenile growth prior to sending to me is continuing this trend of just producing offshoots and not getting bigger.
Andreas best plants came from the 2004 period where stage 3 as well as stage 2 was often offered and they continued to produce strong adult growth. Now stage 3 plants are rarely offered and they just basal like mad! Something in the chemicals used for the TC perhaps?
Any suggestions as to kick start any adult growth? I use Trichoderma atroviride and once established Maxsea.