I think it depends on the type of bog plants that you are growing.
http://www.pitcherplant.com/ specializes in pitcher plants and other
carnivorous plants. The marshes and bogs are very low in nitrogen and very
acid, therefore they recommend the cheap liner with holes in the bottom.
This type of bog is good near the pond for some of the exotic plants, but
not recommended as a plant filter system. For plant filter systems, with
water flowing from the pond, you would want the same good liner that you
would want for the pond.
--
RichToyBox
http://www.geocities.com/richtoybox/pondintro.html


"Richard Holub" wrote in message
hlink.net...
I am planning on setting up a bog garden this summer and have a question
in ref. to liners. After doing some reading I noticed that some people
recommend digging the whole and lining it up with a cheap liner, then
making holes in the bottom for slow drainage. I plan on eventually
building a pond for fish alongside the bog garden. The bog garden I
plan to use as a filter. Size of bog ~10'W x 20'L x 18"D

1. I plan on using a good quality liner with some type of pvc piping at
the bottom to help distribute the incoming water from the future pond.
I want to use this pipe system to help me partially drain the bog for
the winter. Is it a good idea to drain the bog?

2. If I do not poke holes in the bottom of the liner, will the bog
garden begin to putrefy? THe bog garden will probably stand alone for a
couple of years until I get time to build my pond.

Thank you in advance for any assistance.