One of my Black Madeira tip cuttings still has no roots after 7 weeks.  It's still in good shape.  Still green at the cambium layer, firm, no mold.  Just no activity.  Any advice would be appreciated.

What location is the cutting in and how are you rooting it?  A basement or upper floor?  I was having bad luck rooting cuttings in my basement, but once I moved it to the upper living area, it took off.  Every environment is different, but in my case, the humidity levels were poor in the basement.
I always use clear plastic shoebox containers with coco coir for rooting.  Hope that helps.

What is the environment that the cutting is in? Dirt, soil, perlite, water, warm, cold, dark, light, big cutting, little cutting, diameter, number of nodes, root compound, how old is the cutting, etc, etc ????   

i find heat from the bottom (keeping soil warm) helps roots

Location: 1st story, guest room kept at ~75ºF.  

Environment: Dark, no light.  Parafilm wrapped around the top 2 inches above medium.  No other humidity provided.

Rooting Medium: 50% coco coir/ 50% coarse perlite.

Rooting Hormone: Clonex at the freshly cut end within 1/4in from the bottom node.

Number of nodes: 4

It wasn't getting any heat other than ambient.  All my heat mats are being used, but I went ahead and stuck it on a shelf over my grow lights.  The previous cuttings in that location did well.

I've had cuttings of certain varieties take over 90 days before they started to show growth.

I had a Black Madeira that did nothing until the second season. Just when I was ready to give up the thing took off. Keep the roots warm and be patient, good luck

As long as there is green, there is hope.

BM's are one of the hardest root, hence it's not too abundantly sold. And it fetches a higher price. Keep at it if it's not rotten.

When that happens to me I change the medium just in case there's a germ or toxin or bad juju.  I usually go with more air although your medium sounds fine.  In your case I'd switch to the coarsest possible perlite, all dust rinsed out and then a pinch of peat moss on top without coir.  I also scrape some bark just enough to show some green in the lowest part of the wood and put clonex on that.  It's odd but a cutting with no rooting hormone will often root from the bottom edge but I've never seen roots from that edge when I put clonex there.  I have no explanation it's just what I've seen.

Thank you, gentlemen.  I'll exercise more patience on this one.   

I've had some take 4 months....I'd say score bark between nodes and add rooting hormone...

I'm at the point where if they take more than 6 weeks and still look healthy I pull them out gently, if no signs of roots, on goes the hormone...

Joe, I like your plan!
But I am not happy with Klonex rooting hormone. 
The gel stick to the cutting and seems to stay wet for too long and I think contributes to rot.
Would like to try some other rooting hormone and see if results better.

I've been using this stuff HERE. I originally picked it up because it has a fungicide and the idea of a gel appealed to me because I was concerned about inhaling the powder. I've never used anything else though so couldn't compare it to any others.... You have me thinking now about some recent failures due to rot.

I've been using this stuff HERE. I originally picked it up because it has a fungicide and the idea of a gel appealed to me because I was concerned about inhaling the powder. I've never used anything else though so couldn't compare it to any others.... You have me thinking now about some recent failures due to rot.

I started cuttings on 1/13/17. They are in a cup of water on my kitchen counter near a north window. They are starting to get initials. I think having patience is part of the process. Good luck!

I was curious, so I gently slipped it out of the 50/50 coco/perlite and finally there were some nice big fat roots forming along a scored area where I brushed on some clonex.  Woohoo!  I did move it to a cup with pure perlite though.  I'm seeing a rise in fungus gnats.  They seem to love the coco--even when I dust the top of the cups with DE.  They just crawl all over it like it's no problem.  Nasty little creatures.