The tulip is one of the most popular and most hybridized bulbs in the world, the cultivation of which has been very successful in Europe. It is a true bulb, a native of Turkey. Tulip bulbs are planted in autumn or late winter in a sunny place, with a fresh, deep and sandy soil, so that their development is not slowed down by an overly compact substrate. Bury the bulbs at a depth equal to the diameter of the bulb, and if you live in an area with very cold winters, and you want to leave the tulips planted, increase the depth by about 50%. Leave a space between the bulbs equal to one and a half times, or twice, the diameter of the bulb. The tulips do not need further care, except for watering them if the ground is very dry in the spring months, when the plant grows. In late winter scatter some slow release granular fertilizer among the bulbs. Tulips can stay in the ground all year round, even in winter. If they are grown in pots, however, it is best to place the pots in a sheltered place, or uproot the bulbs when the foliage is already dried up, and store them in a dry, cool, dark place, until it is time to put them back in their pots.