Beetroot Hula Hoop, mélange de 4 color - Buzzy Patio Vegetables. Beetroot mixed 4 colours. A vegetable garden on your balcony, rooftop terrace or in your garden? Beetroot Hula Hoop can be grown in pots, tubs, plant sacks or in a square metre garden. Sow in rows from mid-April to mid-July. A wonderfully colourful mix of round beet varieties.