root size and repotting in s/h

[Becca]

Okay, one of my orchid seedlings (Hknsa. Sogo Doll "Little Angel" AM/OSROC) finally grew about 4 or so really good roots ranging in size from about 3/4 of an inch to an inch, which I had in sphagnum moss while regrowing its root system. I was told that if new roots on orchids are ever so slightly bumped that they will stop growing because they are fragile. So when I am converting a plant with new growth like this into s/h and I am filling the container with PrimeAgra, will the roots be damaged and stopped growing when the PrimeAgra is filling in around and over the root? It is pretty much impossible to keep the PrimeAgra from bumping the tip of the root, but yet it is recommended to convert a plant while it is in new growth so I am slightly confused on when the roots are not as fragile so I won't damage them?

[Ray]

If the "bumping" thing was true, no plant that had ever been repotted in anything would ever keep growing!

[Becca]

Okay, thanks Ray! I really appreciate all the answers you give to my questions, I know I ask allot of questions and it is much appreciated, ALL answers received are much appreciated!

[Oscarman]

It is true that if part of the root tip is broken off, it will stop growing.......isn't it?

[Ray]

Yes, but very often the root will branch and grow several tips.

Sometimes, if I have a plant with only a single, actively-growing root, I will intentionally cut off the tip to force the issue.

[Ross]

Originally Posted by Ray

Yes, but very often the root will branch and grow several tips.

Sometimes, if I have a plant with only a single, actively-growing root, I will intentionally cut off the tip to force the issue.

Not having anything to do with S/H but I agree with Ray. I have had old "dessicated" apearing roots spring to life with new green tips. I believe that only the plant knows for sure where the next root will grow!