A shorter veg
Most autos spend two to four weeks growing before they start to flower. Use the Veg 1 to Veg 3 rows for those weeks, then move to Flower 1 as soon as you see the first pistils.
Lighter is usually right
Autos are smaller plants in a short window, and there’s little time to recover from overfeeding. Start at the low end of the band for your medium and only climb when the plant asks for it.
Let the plant set the finish
Some autos finish in seven weeks of flower, some take ten. When the plant is clearly finishing, step down with the Flower 7 and 8 rows and the optional ÉLAN finish week.
Plan it in the calculator
Set veg to three weeks in the full-grow planner and adjust the week mapping to match your cultivar.
Reviewed 8 October 2026. Research cited here explains plant science in general; it is not a trial of a Crazy Hills product. How we handle evidence.