Within two weeks, a plant that was a 4-inch rosette becomes a 3-to-5-foot tall shrub. The small seed becomes a "tree" (or at least, a very large herbaceous plant) where "birds of the air come and find shelter in its branches."
Here is the chemical miracle: The seed contains a dormant embryo and a packed lunch (endosperm). Water activates enzymes that begin converting those stored starches into energy. The radical (the first root) emerges, driven by gravity to head down . mustard seeds growing
Why a paper bag? When the pods explode in the bag, the seeds fall to the bottom rather than onto your floor. Within two weeks, a plant that was a