Is this a nutrient diffecency?

[aquanewb]

I have some Wisteria that has roots coming out of it all the way up the stem along with the leaves. Is this because it is trying to get a nutrient that it isnt getting? Do Wisteria plants just "do that"? As an aside I know that it also sends out new stems in a similer fashion (This thing is like a weed the way it grows) but these are definitly roots that if left unchecked will sink themselves into the gravel.


BTW the list below is wrong now but I am lazy

 

[plah831]

I have quite a few plants that do that, too. For example, my wisteria, giant hygro, narrow-leaf hygro, Ludwigia repens. I don't think it's a sign of a deficiency, but I may be wrong. What I think of when I think "nutrient deficiencies" are things like curled or yellow leaves.

I do use gravel instead of a plant substrate, so maybe it is because the plants aren't getting what they need from the substrate. Gravel doesn't hold onto nutrients like clay-based substrates do, so maybe they have to send roots out in the water column to get the good stuff?

The narrow-leaf hygro is the worst in this respect. It's put down about 6 inches of roots from way up in the stem, in the past week!