[Soup12]

both can be tied to driftwood and both are hardy.... They look similar?

whats the difference between them?

 

[Monster Fish]

Crypt wendtii green should be planted in the substrate to get the best growth IMO. Java fern should be attached to hardscape and will grow slow and steadily.

 

[HybridHerp]

Yah, I heard once that crypts can be grown on hardscape but......that's not really a thing lol.

What Monster Fish said is correct.

 

[wheatiesl337]

Crypts can be grown on hardscape, but in my experience grow slowly and stunted. I have let a couple volunteers from root trimmings do this. They are much happier in substrate.

Java ferns and crypts are completely different plants and act much differently; however, both are generally low-light, low-tech tolerant.

 

[musician71604]

I agree. Crypts grow much better planted in the substrate than attached to hardscape.