This is a really cool old thread and worthy of a bump.
Quote:
Originally Posted by Tom Wagner
The hybrid vigor of F-1 Striped Students x Helsing ★★★★★★★★ Blue was obvious....lots of suckering growth with many blooms. The hybrid had none of the physiological leaf rolling of HJB. So leaf rolling is recessive.
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I didn't know there was a leaf rolling gene. I thought it was only caused by environmental stress - me doing something wrong as a grower. My HJB also had leaf roll; I thought it was just unhealthy. I also culled a plant of another variety earlier in the summer due to leaf roll. I was worried it had some sort of disease. It probably just had the leaf roll gene.