Paph FD advice

[IvoPhal]

I Bought paph 3 months ago and I repotted from CHC In some mixture: bark, perlite, sphagnum moos, lecca and Caribbean sand. The pot is 4 inches and during I treated the plant with kelpak, Akerne’ s fertiliser (Europe MSU version) at 100 ppm weekly N.
The plant is close to the window, southeast, RH is 50-60 %.
I search deeply in the forum for some info but I understand that members growin fabulous FD. My problem is that paph is not growing at all, although seem to me that is in good shape…

 

[Ozpaph]

it is winter so they do slow down. The new growth is encouraging

 

[IvoPhal]

Actually the new growth was exactly the same few months ago but I have patience thank you.
The other ones branchys, I purchase them all together, started a new leaf but this one is “silent”.

 

[Ray]

Warmed up a bit might not hurt.

 

[IvoPhal]

I'll try to raise the temp, right now is around 70 degrees.
Oh, you recommend me the use of heating mats.....thank you again!