I was adding a 3rd bench to the shade house yesterday (too many bunched up plants) and noticed that I have 5 and possibly 6 plants in spike. When is the best time to start using a flowering fert ? When the spikes start showing or when they start to open up. I will take some pics when they open as 3 of the I have no id on them. But I will post all. Thanks for this wonderful board and the great help everyone provides.