Auto purple punch how long to start flowering

Flowering depends how much you train them, if you let them grow without any you will get there in 4 weeks if shes doing fine 😊 HPS or LED will forever be a fighting question, I've grown with both HPS takes less energy out the fan leaves but sure gets warm and makes your electricbill go through the roof! Try 1 cycle and get your opinion! I like LED more! Happy grows 💚

Autos normally start flowering somewhere between the third and fifth week. Nearly everyone will say LED, but I still think a decent HPS/MH combo, while being more expensive to run, provide a better light intensity and more growth. That is, metal halide for veg and a high pressure sodium bulb for flowering. Cheers, Organoman.

Generally it takes 4-6 weeks after the plant is above ground before flowering begins. In some cases it can take 8 weeks or never at all and you need to switch to a 12/12 light schedule and grow it as a photoperiod plant. I can almost guarantee that your LED light is NOT 1'500 watts. That is just a artificial marketing number (a lie). You need to measure the actual wattage consumed or look in the light's specs for it's actual wattage.