Are there any vegetables that I shouldn't try to grow as a beginner?

I agree cauliflower and celery can be disappointing. Celery needs a ton of water or it bitter and strong tasting. Leeks are a little more maintenance too, as you keep burying then stem as they grow.

You can grow them all and that's how you'll learn. But if you want hard to mess-up types where you have a great veggie at the end, lettuce, spinach, leafy greens, garlic/onions, tomatoes, radishes, beans, peas, peppers (but can be slow), carrots, beets, and potatoes planted under a black plastic mulch with a hole for the tops-no weeding or hilling needed.

My lettuce and spinach grows really well. The main vegetables will take longer like cauliflower and beetroot. Tomatoes are good as well.

This answer depends on where you live and what your soil is like. There are certain this that grwo in certain areas of the world easier than others.

Cauliflower, apart from that go for it you will make mistakes but thats part of the fun.

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