Pak Choi Green F1 - Buzzy Patio Vegetables. A vegetable garden on your balcony, rooftop terrace or in your garden? Pak Choi Green can be grown in pots, tubs, plant sacks or in a square metre garden. Sow in intended location from mid-July to late-August; thin out if necessary. This Pak Choi has a soft flavour and is highly suitable for stir frying.