Prismarine Shards are items added in 14w25a that can be obtained by defeating the Guardian mob. They can be crafted into Prismarine variants such as Prismarine Brick and Dark Prismarine.
After veg they will usually flower for anywhere for 8 to 9 weeks. The breeder recommends growing Jack Berry F2 in a SCRoG type grow, where the yield can reach above average, at best. This is a strain that spends most of its energy developing trichomes, rather than bud mass. Don't expect huge yields with this one. In most cases, it simply isn't possible.
Second Class The second class of lever (fig. 1-2, part B) has the fulcrum at one end, the effort applied at the other end, and the resistance somewhere between those points. The Figure 1-2.-Three classes of levers. Figure 1-3.-Oars are levers. wheelbarrow in figure 1-4 is a good example of a second-class lever.