Grade 3 - Triumph.
Combines multiple varieties with large variety of colors, most goblet flowers of different heights (40-70 cm). Triumph tulips bloom in a few days later, early varieties. Applied to the middle and late forcing, for garden decoration.
Grade 4 - Darwin's hybrids.
This is a popular class of tulips early and mid-flowering period, up to 80 cm. Darwinian hybrids are relatively resistant to viral diseases, breed well, have a very large goblet flowers - plain or with a border, with a symmetrical pattern (flames). They are well tolerated in long-term storage and transportation in the vase life. Recommended for cutting, forcing, landscaping.