Is blanch freezing vegetables required for short term storage? I need some vegetables to last for about a month until I've juiced them all.

Blanch freezing many vegetables sees them last for periods 6 months and longer, but it's a bit of a hassle.

Would just ziplocking them in the freezer direct give me a month? I'm talking carrots, celery, spinach, zucchini. I'm sucking air out with a dustbuster which is nowhere near a vacuum sealer but hopefully better than not doing it.

Would putting the celery and spinach in a bowl of (sugared) water keep them going?
Blanching is done to halt enzymatic action that would start to destroy the plant cells. You can freeze without blanching and the veggies will still be edible even after 6 months but their quality will decline faster.

If you are planning on juicing those veggies within a month then you are going to be doing a lot more damage than the freezer will and I don't think you would see much benefit from blanching. The spinach and celery might stay a little greener when it thaws- the carrots and zucchini would probably not be effected at all.

As for the sugar water. Are you planning on freezing them in the water? I don't think that would do much but dilute their juices when the ice crystals rip them apart. Of course you wouldn't be able to keep spinach in a bowl of water for a month- that would be more like a swamp than food.