To make a 'vertical garden' you'll need water-resistant seed-bags, specially designed for wall-mounting. If handled correctly, walls should remain dry whilst watering. These plant bags should be available at garden centres or florists, and can be planted in just a few steps and then attached to the wall.
For a 'vertical garden' of poinsettia, first, waterproof felt bags are filled to a third with commercial potting soil.
Now we can use the poinsettias. Carefully remove the plants from their pots and place them in the planting bag, tilted slightly forward.
At first, plant the bag minimally, then later on the poinsettia will grow to be more impressive.
Several plant bags hung side-by-side offer a particularly magnificent effect. Poinsettias do not tolerate 'wet feet'. To avoid water-logging, only a small amount of water should be carefully poured onto the rear tongue of the bag at regular intervals.