Plastic Greenhouse Extension for \"Tropical Island M\" - Bio Green Thinks Ahead Your plants grow, your plastic greenhouse grows with you. With the growing prosperity of your green and blooming garden treasures, you can easily expand your Tropical Island M with our plastic greenhouse extension. No matter what size you need in your garden, for almost all plants there is the appropriate additional height in 1-metre (approx. 3.3ft) steps at Bio Green. Thereby your foil greenhouse Tropical Island M with 5 elements can be extended up to 5 m (approx. 16.4ft). With a zipper, you attach each foil element to the other. Each extension set contains the required stabilising Easy-Click rod extensions.