The weekly update:
Z#3 turned out male, Z#1 and Z#2 had tiny preflowers which looked like male clubs, so I moved away the 3 plants to free more space for the rest. Here are the males:
Z#4 was the first to show pistils, Z#6 followed, and only Z#5 hasn't shown sex yet. I selected Z#4 for this season:
Z#4:
Z#5:
Z#6:
Z#3 turned out male, Z#1 and Z#2 had tiny preflowers which looked like male clubs, so I moved away the 3 plants to free more space for the rest. Here are the males:
Z#4 was the first to show pistils, Z#6 followed, and only Z#5 hasn't shown sex yet. I selected Z#4 for this season:
Z#4:
Z#5:
Z#6: