Question
We've bought plants from you for years and have had great success.  Bog garden over time has too many grass plugs in the mix.  Appears no other option except removing all the pitcher plants and hand pulling all grasses then replanting the pitcher plants.  Upon replanting, would you suggest splitting the plants and removing the previous years growth?  We've been placing semi-chopped pine needles as mulch to keep as acidic as possible.  

Location: Maryland
Bog garden size/shape: ~12x8 ft/kidney

Answer
Yes, grass is a perennial problem, even for us.  Every spring we have to repot plants that have excessive grass in the pots.  It's a good idea to do this because some grass species will inhibit root growth of other plants.  I highly recommend replanting your bog garden to remove the grass.  This will restore the aesthetics and health of the garden.  

Yes, follow the recommended guidelines outlined in our monthly video podcast.  Remove all older growth, except for psittacina and purpurea.  For these species, just remove the leaves that are more than 50% brown.  With large clumps of plants, there is risk of the middle section rotting out, so you should also divide large clumps as well.
http://youtu.be/PMlJkvjjzpk

After restoring your bog garden, schedule about 15 minutes every week to weed your garden.  This is very important to prevent large clumps of grass.  Think of it like weeding a vegetable garden or a flower garden.  It's just something you need to do to extend the life of your garden.  Otherwise you will need to redo the garden every couple years rather than when plants outgrow the area.  
http://youtu.be/d4iRAtNcDB0

Good growing!
Jacob Farin