Ideal Depth of Bog-Garden? 16-18', 24', or 30'?
Some sources say that a bog garden should, ideally, by 2.5 feet deep - i think that sounds like over-kill.
Of course, too shallow would cause problems with insufficient water-retention and overwintering[?]
I live in zone 6b [NJ], where we can go down to -15f. What do you think I should make my peat/sand bog garden, without going anyfurther in depth then is useful/ideal?
i think my frostline is 18"