Q&A for How to Grow Marijuana Hydroponically

In places where marijuana is legal, you can get seeds from a dispensary that sells marijuana products.

24 inches is not large enough to flower marijuana.

If non-medically used in certain states, yes. If you are over 21 in Colorado or Washington, you can recreationally use marijuana legally.

As long as the light you use is not hot, lower it and put a small fan on the plants. The fan will help the plant to be stronger and the lower light will keep it from trying to stretch up to reach the light source.

Top the plant when it reaches 5-6 inches tall and continue to do so after each previous top has grown three inches. This will produce a fat, bushy plant. You will need to put some lights lower down after the plant begins to fatten up.

Find a brand of nutrients for hydroponic plants, and follow their nutrient schedule. The schedule will vary as you go through the growing cycle. NPK ratios will also change. Even then, you may have to tweak this depending on what you are growing.

Hydroponics will bring bigger, faster yields, but it's a science and mistakes are difficult to correct. Soil is grower-friendly; mistakes can be mended and a simple flushing of soil will usually fix the issue. So it really depends on your preferred level of difficulty.

Yes, any light whatsoever, even a flashlight, can shock them. They need to be kept in total darkness.

Just an inch or so above the water, the goal is to have the roots eventually drop into the water, which will cause a massive growth spurt when it finally happens.

Perhaps, but using distilled water would be better.

You should clip clones before you start the flowering stage. It's best to take clones in the veg state.

Use Sunshine soil less mix. Mix a very light food to water ratio and water small amounts every day, and only water for the last two weeks. Fill 2-liter bottles with water and let them sit for two days before using. Have 6 bottles in line so that each one is settled and ready when needed.

A few months, generally.

If in the vegetative stage, yes, but not in the flowering stage.

If you’re growing in a deep water system, the rock wool won’t get wet enough to germinate the seed. It shouldn't be a problem If you’re growing in coconut fiber (as long as you keep it moist enough), it’s just not optimal.

You can't use dirt and grow hydroponically. Hydroponics means without soil.

No, you should not consume plants that develop mold.

Plants don’t show their sex until in the flowering stage. A few weeks of 12/12 lighting should cause them to show.

After the first week of plain water, start at 1/4 of recommended nutrients. Gradually increase to full nutrients over the next 2 weeks.

If you are growing hydroponically, you'll want to change your water once a week. Up the nutrients and then you'll need to flush your plant once you get about two weeks before harvesting. That's when you'll use pH water without any nutrients. If you don't, your smoke will be extremely harsh and have a chemical aftertaste.

If you place the seed under a microscope, you'll notice the ends of the female seeds look like volcano openings.

Only if growing cannabis in general is illegal in your area. If it is legal to grow marijuana, then it doesn't matter how you grow it.

It should get about 18 - 24 hrs a day until it reaches a mature size (half the height of your growing area). Then it should be switched to 12/12 hours in order to flower.

At least 5 gallon felt pots should be used. These pots would allow air to flow to the roots. Coco would be ideal.

Let it heal by not watering it for a couple days, then see if it is back to normal, if not repeat the days until it looks better.