Tulipan (Tulipa) enjoys well-deserved popularity due to numerous advantages, such as: early flowering, beautiful colors of flowers, and the possibility of accelerating flowering in the winter and early spring months. The tulip should be dug up annually, because it enables a selection to be made and protects against disease. Tulip bulbs are planted in the period from mid-September to mid-October. Before planting the bulbs, it is advisable to disinfect them – soaking in various chemical preparations or 0,4% formalin solution by 1-1,5 hours. The bulbs are planted one at a time, in depth 8-16 cm, depending on their size. Planting spacing also applies, depending on the variety, leaf habit and planting application. The distance between the rows should be minimum 20 cm. The distance between the plants in the rows should be approximately equal to the circumference of the onion – 6-10 cm. The place for tulips should be fertilized with well-distributed manure (dose 6-8 kg/m2) or compost. Besides, mineral fertilization is used in quantities: 5-7 day superphosphate, 4-5 dag of potassium sulfate, 3-4 dag of nitrogen fertilizers on 1 m2 in autumn additional, per capita, at spring 3-5 dag / m2 of nitro-chalk and multi-component mixture, like for example. Azofoska (2-3 day / m2). Tulips should not be planted in the same place more often than what 5 years.
The tulip is approx 15 thousand varieties, differing in origin, application, flowering date, the color, shape and size of the flowers. All these varieties are classified into 15 class, of which they deserve attention:
Early flowering tulips
1. Single early tulips – e.g.. Brillant Star – plant height approx 30 cm. Scarlet flowers, length 6,5 cm, at the base of the petals, on a yellow background, big, olive brown stain. The flowers open wide at the beginning of flowering. Brillant Star maxima differs only in slightly larger flowers. Christmas Marvel is higher – 35 cm. Dark pink flowers, length 7 cm, base of petals white. Bellona is also tall. It produces large flowers, length 6,5 cm, pure color, golden yellow, the base of the petals more intensely colored, also golden yellow. Tulips in this group bloom the earliest among garden varieties, usually in the second half of April. The flowers are pure in color, Red, pink, yellow and white, violet or two-color varieties are less common. They are mainly used for accelerated crops.
2. Full early tulips – they bloom simultaneously with single early tulips. The height of the plants is 25-30 cm. The number of petals is multiplied, therefore the buds are spherical, and the unfolded flowers open wide and have a shape unusual for a tulip. They are not suitable for cut flowers.
Medium early flowering tulips
3. Mendel's tulips – most often they have red flowers, pink and white. Plants bloom in the ground at the end of April and beginning of May. Many varieties are suitable for early driving.
4. Triumph tulips – formed by crossing varieties from the group of single early ones with Darwin's tulips. They are slightly taller than Mendel's tulips, reach a height of approx 50 cm. The flowers are quite large, usually red and pink in different shades. Many varieties have flowers with a lighter border around the edges of the petals. There are less yellow and white varieties. There are many varieties here that are primarily suitable for cultivation in the open for cut flowers. They usually bloom in the first decade of May, after Mendel's tulips, and before varieties from Darwin's group. Many varieties are also suitable for forcing.
5. Darwin hybrids tulips. Varieties of this group – combining all the positive features of the parent varieties: the high growth and fertility of Darwin's tulips and the early flowering and huge flowers of the Tulipa fosteriana group – they are the most popular with us. Most varieties have bright red flowers, sometimes differing only in the color of the base of the petals, and even stamens. They usually bloom at the end of April, almost simultaneously with single early tulips.