Crochet help - joining granny squares

[IDoLikeARainbow]

Arrggh

I'm trying to join some granny squares with a slip stitch, despite trying my best to keep my tension loose they are a bit 'gathered'.

Do you think I need to frog the joins and start again or will I be able to block it flat?

Thanks

[Badweekjustgotworse]

pin it out on your ironing board and steam it with your iron then let it cool on its own, move it and do the next section. looks great btw!

[IDoLikeARainbow]

Thank you, I've got another couple of rounds to do on the border but didn't want to do that if I needed to start again!
Will try blocking it. Thanks

[tizwozliz]

Looks great and think it will flatten out fine. What's the pattern? I'm looking for a granny square pattern that doesn't involve changing colours all the time

[Hooksville]

You need to use a bigger size hook when you join... it stops it getting all rucked up. I always go one size larger

[raisedbyguineapigs]

I'm doing one massive granny square but mine looks a bit boring. Its just double crochet shell stitch. I love your pattern. id like to know what it is too!

[IDoLikeARainbow]

Thanks All, it has flattened out after a bit of pinning but will try the using a larger hook to join next time, thanks Hooksville.

Pattern is based on this pattern by Purl Soho although my squares are actually these and I only did one round of the contrasting border.