It depends on how big the flowerbed is. It pays to plant garlic. You plant it before the winter, you dig it shallow once in the spring and then you only occasionally pull out larger weeds by hand. During the dry season in May, you will pour well and then engrave according to the variety in time. You can grow 2 harvests of dill or spinach, but you need to water them. Or plant tomatoes and plant dill and spinach on the edge of the flowerbed. Both are plucked at harvest, so it won't hurt the tomatoes. You can also have a lovage or lemon balm in the corner of the flowerbed. I plant pre-grown pickled cucumbers in the flowerbed planted with tomatoes along the edges, and when I have enough of them to cook, I pull out the plants. I also plant parsley and celery there. Onions do not pay much, nor carrots.