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.
Standard F1-F12 mode . This means, you have to press the FN key to use the standard F1-F12 function keys. You can configure the Function Keys Mode by selecting the Special function mode or Standard F1-F12 mode by the help of the HWSetup Utility.