Q&A for How to Freeze Swiss Chard

Blanching can be completed using boiling water, steam or a microwave oven. To steam, place the chard in a wire basket over rapidly boiling water, cover and start your timer. Steaming takes one and a half times longer than boiling. Microwaving is good for some vegetables, but not recommended for leafy greens. In any event, make sure to have your icy water handy, that's what preserves the color and texture prior to freezing.

Yes, your Swiss chard should be fine without blanching.

Yes, this should be fine in the freezer for 2-3 months or so, but you need to make sure it's properly sealed.

Not a good idea to freeze glass as it can break with the temperature change, or if you drop something else frozen on it. And it's really hard to tell glass and ice apart.