Will echium regenerate in forest bark mulch’s?
I have a small echium developing in my garden and a looking forward to many others in years to come. It is surrounded by forest bark mulch. Will this have a a negative effect on future seeds germinating?
They are self fertile so will always produce viable seed. Once the flowers have faded, you can either leave the (brown) flower spike where it is or cut it down and shake the seeds (one in each ex-flower, the size of a pin head) around the garden. The seeds seem to remain viable for many years and might germinate anytime from the same year they flowered to 15 years hence. If you like them, you'll need to get to recognize the seedlings so as not to weed them but to leave them.
The mulch should not be an issue. If they are growing, do not disturb!