Seaweed

Just to add I have been moving the soil from a bed which had flatworms in it, last year I put a lot of seaweed on this bed, something I had done the previous year as well, when moving the soil it looked in very good condition plus a fair number of worms present, I know flatworms can go into a dorment state till the earthworm population regenerates but as I have other beds with a good worm population, which I think any flatworms would migrate to, I have found them in a raised bed in the greehouse, I am of the opinion that seaweed controls them, I don't know if it kills them or that they just move somewhere else, but I have other three raised beds and a flower garden all with worms in them, so if you can 0ut lashings of seaweed on your garden