Help! Garlic leaves going yellow

[King Carrot]

I'm wondering if I've overwatered them and maybe liquid seaweed would revive them? Here's a wee photo ... Dunno if this is normal because I've never grown them before at all:

Am I the only one not seeing any wee in your photograph.

[Nibbler]

Excellent news. We now have a watering can in the cloakroom, I can tell when my partner is using it because I can hear giggling down the hall.
My garlic is in pots and has yellow tips too... I'm not especially worried because the leaves are massive and the roots are escaping out of the holes at the bottom of the pot!