Plant Growth Accelerator Mod makes plants grow faster by adding a single block. It mean send random ticks to the plants above it. The wheat will grow at a significantly faster rate if you you stack several PGA’s, one on top of the other, place a block of dirt, hoe it and place seeds on it. This way is also effective with all vanilla plants like: nether wart, potatoes, cactus, melons, etc… but with stuff like Natura’s cotton seeds or Magical Crops’ stuff, it is unsure.
The recipe shown above is the ‘easy’ recipe. The medium recipe requires Obsidian and Nether Quartz and gives 3 accelerators. The hard recipe requires End Stone and Emeralds and gives 2 accelerators.