gentians - what am I doing wrong?
I've been growing gentians for about 4 years now - (G. septemfida and G. acaulis). A couple of years they were great - but this summer and another -they look quite miserable. Here in central WI we've had a fairly wet spring. Our summer this year has been (I think) ideal - 70s, 80s and not too humid. My soil is naturally sandy and I've amended it with rotted bark and peat moss. Have I made it too acid? What happens is their growth is strong and then a whole stem withers away. A couple of plants have shriveled up and died. Wet rot?