Depends on the plants and, to some extent, the koi. They do dig and root
and will munch lots of roots. Sufficient Quantities of plants work as do
certain plants.

Our koi devour anacharis and munch on hyacinth roots.
Enough hyacinth and they don't destroy them.
Parrots feather seems to do fine...not eaten.
Lillies get pushed around but not eaten.
Frogbit is sometimes eaten.
Duckweed is a treat!
Rock less that 1.5 inches are 'moved'. Bigger aren't.
Dirt is a play toy.

What are you thinking of putting in?

Phyllis
____________________________________________
Check out Jog-A-Thon fundraiser (clears $140+ per jogger) at:
www.jogathon.net
See our pond at: http://www.home.bellsouth.net/p/pwp-jameshurley
"LYNN FORRES" wrote in message
. ..
new to koi - 5 nice sized koi in 700 gallon cement pond - the local
experts
tell us that you never put plants in with koi because they tear them up
and
make a mess. Seems like they would like a little shelter with plants.
Please share your experience with us. TIA L.