new to gardening (in austin,tx)

Hi guys,
so this is basically my first time gardening (I've done some container gardening last year tho).
I have a few questions I was hoping ya'll could offer some advice on. I've attached some pics to reference.

I'm growing some sweet corn and they're looking really good, but are they too close together? They are about 7 in apart, should I thin them? If so, is it worth trying to relocate them?

I bought a bunch of Texas sweet onions (white). As you can see they are somewhat standing up, but they are very flimsy and some "stalks" are fallen over and the tips are dried and browned a bit on some. I planted them about a month/month and a half ago. Is this normal/healthy? do the tips need to be trimmed?

I've got a little planter that I started some cucumber seeds in, they are about an inch to an inch and a half tall. How long should I wait to put them in the ground?
The three on the left have very slightly turned yellowish, is that bad?

Thanks so much in advance, I'm very excited to have a garden this year!
Brian

I can't help you with the corn because I've never grown it, but I can tell you that they either need to be thinned or some dug up and transplanted. I would imagine you'd need at least a foot or more final spacing for them.

Your onions are looking great! When the onions start making a bulb on the end, they actually end up sitting on top of the soil. The green tops will be about 12" - 18" long and they will entirely flop over. That's when it's time to harvest them.

The cucumbers need to be much bigger before transplanting them out in the garden. I'd look for at least 2 sets of 'real' leaves that are about 2" -3" in size. I direct sow mine where I want them and the squirrels help me thin them out. >:/

Feel free to post over in the beginner veggie forum. Lots of Texans over there, too.

Thanks Stephanie!
I think I'm going to try to move a few corn plants to free up some room.
And I'll give the cucumbers some more time to develop as well.

As for the onions, I'm finding conflicting info around the interwebs.
Some sources say to keep the seedlings trimmed to 1-3" when starting from seed indoors, then let them be once they're in the garden.
And other sources say to keep them trimmed to around 6" when they're growing in the ground.

Can anyone offer their suggestions?

You might want to listen to KLBJ radio AM 590 on Saturday and Sunday mornings. They have a show with John Dromgoole who has been gardening a long time in the area.And you can call in with questions. He loves people who ask questions about vegetables as he is very concerned about wanting everyone to garden organically and raise their own food.He has a wonderful nursery south of town that has a great demonstration area you can check out.

cool I'll check it out!