Broccoli gemini f1easy to grow, it's the quickest broccoli to crop!gemini is on the quickest broccoli to crop, as quick as 80 days from sowing to harvest. Easy to grow, this variety of broccoli has good disease resistance and produces florets weighing 300 500g each. Reaching heights of 41 50cm 16 20 spread 41 50cm 16 20, it's the perfect vegetable for beds and borders or raised beds.harvesting from late july mid november, the broccoli gemini is a very attractive variety with a luscious green dome shape. After harvesting the main head, side shoots can be picked and eaten too! Broccoli is packed full of essential vitamins and a good source of iron. Can be cooked or eaten raw, add this variety to your favourite dish or blend for delicious broccoli and stilton soup.