Man made sea stack

[Copyafriend]

I think sea stacks are a fun idea, but having to revisit them on the sea at night kind of prwvents them from being anything more than a nuisance.

so i propose something simple:

stacked stone: 6 cut stone

you can replant sea stacks on land, or make a new sea stack. they keep their mechanics as they exist on land being hostile to any nearby npcs and players. Preferably they would lose some max health from being placed out of water, 300 seems reasonable. They could also grow slower and have barnacles take longer as well.
The two main purposes of this addition would be to make barnacles more accessible long term, and to make it a more accessible one plant friend for wormwood. 

[ADM]

I've been looking for this for a while but I don't think using exclusively rocks would be the solution I'd go for but something a little further, instead I'd try make out of Seedshells and then + a rocky material or even Marble Beans. That would make that Sea Weed item rather worth to farm on top.

[Bumber64]

I don't think you should be able to place them on land, just close to it, like with fig trees.

Also, Sea Weeds planted on artificial stacks shouldn't be able to summon fish.