Foe me i just use the ordinary Coco Fibre.
damp it and compress it in the enclosure. Make a deep hole and it will continue to burrow from that. Or just leave it and it will surely burrow..

Err, normal coco fiber will do. Actually not the substrate but the t itself. They are great architect, they able to dig tunnel and they use their web to prevent the tunnel from collapsed. But in this case we are talking about burrower.

BURROWING (***NEW DATA***):
For a long time enthusiasts were puzzled by roses' apparently
unwillingness to burrow in a cage. It was thought that they might be
vagabonds in nature, seldom if ever actually living in a formal burrow.
However, recently Dr. G. B. Edwards (Curator: Arachnida & Myriapoda
Florida State Collection of Arthropods, FDACS, Division of Plant Industry)
on a trip to Santiago Chile, examined Chilean rose tarantulas in large
numbers living in burrows some 45 centimetres (18 inches) deep. Now we
know: Their apparent reluctance to dig a burrow in captivity is apparently
an artifact of being captive, not a "natural" life style.

The general experience in the hobby is that they neither require a burrow
nor use one. When given the chance we've seen them use a coconut shell as
a place to hide, but all of ours have firmly rejected burrows when they
have been offered. This is supported by the experience of many other
keepers. Installing a coconut shell or a plastic aquarium plant that
drapes over to produce a darkened cave-like space might be appreciated,
however. It may decide that's a good place to hide. Otherwise, don't worry
about it.

grats Hyo~
How big is it now?^^

mm... it's actually my rosea 2 inch sling. Digs a lot and has made a tunnel with two openings in my small container. She digs deep and when she finds there's no more room she digs horizontally. I know slings tend to dig a lot but i found that it's normal for roseas to dig.
damping the coco fibre is out of the question as it's a rosea we are talking about.  i tried it compressing coco fibre to the max but her tunnels always collapse, making her very frustrated and angry(No threat poses just bite anything enters the opening of the container， tweezer or brush; no warning what so ever)

I am planning to rehouse her to a taller enclosure to see how deep she can dig but i need to find some sort of substrate which can hold tunnel better than cocofibre. I heard that potting soil with a mix of vermiculite and cocofibre will work for dry burrows.

PS: I finally understood how abnormal are rosea. They are unpredictable and have frequent mood swings. At least for a OBT you know it always want to bite or run fast.

And 1 more thing, i observed that they use their fangs to transport those substrate and during the process, the substrate are rolled in sphere shape. Maybe they have the same mechanism like swift that use their saliva to build their nest. (I am not implying that rosea using saliva to hold the substrate but maybe those same material they use to make web?) 

Lampropelma atau Cyriopagopus?

Lampropelma atau Cyriopagopus?

thats a MET

Ryo's picture?
he listed there H.incei on top of the picture

Ryo's picture?
he listed there H.incei on top of the picture

Sure issac, will u be at jaya one exhibiton on 6dec?
I might bring incei to the exhibition