Plant ID please
These clumps of flower spikes have appeared in my front garden this year. They may have been in a packet of wild-flower seeds I scattered. Some have pale pink flowers, others deep purple. Most are 100-150cm tall.
1. Could anyone tell me what they are? I was thinking maybe some kind of Veronica, but the leaves are very narrow.
Possibly mutants of some Veronicastrum seeds from my neighbour? (but each stem has a single flower spike and I always think of Veronicastrum as candelabra-like).
2. I'd like an idea of how long they may go on flowering... there are smaller stems emerging from the clump and I wonder whether I should deadhead/cut down the tallest stems, which are now beginning to set seed, to let the new growth have its turn?
3. If the show is over, I would save some seeds.. should I cut and dry them now or leave them to ripen?
4. If I re-sow them next spring will they flower in the same season, or not until the following year?
Thank you, you wonderful knowledgeable people!