My veg patch is the same. But it had a late start due to cold .
As for seaweed I don't know if you are aloud to take it. But I will be collecting some ( even if its under cover of night
). The only advice I can give you about it is either put it though a shredder if you have one ( don't know if a shredder/ chipper will work, never tried it ) before you put it on your beds. or after its been on the beds for the winter so all the goodness has seeped down into the soil take it off again. Don't try to dig it in if its still long and stingy , it's a nightmare . The year before last after the seaweed had sat on the beds for the winter I dug it in by hand ( well with a spade
) then went over it with my mantis tiller and I still couldn't chop the bloody stuff up
.
And just to state the obvious, collect the seaweed that is above the high tide mark
.