Fortress is one of the most promising purple violet tulips.
The presentation is a beautiful one as it shows the nice violet color in an early stage. The vaselife of the Fortress tulip is very long.
It is a large tulip with very big flowers.
The Fortress tulip is perect for 9 degrees forcing as well as 5 degrees forcing.
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These figures are averages and depend on the climate, for information for your climate. If you are have results of this variety you are welcome to share wit with us so we can keep our figures up to date.