I've never done it, never heard of Chelsea chopping a valerian, I do my tall Rudbeckias. With Valerian it produces a large cluster of flowers which I cut off when it's finished then a load of smaller side shoot ones appear.
Dordogne and Norfolk. Clay in Dordogne, sandy in Norfolk.
All of them @Fire I have whites &pinks for years and, to my delight, the red one has appeared. The red can do what it likes for a while until I'm sure it's established. The white and pink get leggy. I'm going to give it a try next year. It's worked great on my sedums .
It's sort of very dark dusky pinky red but not bluey if this makes any sense. Permanent rose with a tiny tint of yellow ochre I looked on Google images and none of the colours are right
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The red can do what it likes for a while until I'm sure it's established. The white and pink get leggy. I'm going to give it a try next year. It's worked great on my sedums .
I looked on Google images and none of the colours are right