deep water culture weed growing

When growing hydroponically, the roots don’t need to spread out, and they don’t have to ‘search’ for the nutrients since everything the plant needs is readily available in the most absorbable form possible. The dissolved oxygen in the water gives the roots almost unlimited oxygen and prevents the plant from getting “overwatered” or droopy even thought the roots are living in a reservoir of water. This decreased effort in having to ‘find’ nutrients and oxygen translates into increased vegetative growth and lots of foliage, especially if plenty of light is provided!

No, but it has to be a good place for plant roots to live. Some people take the route of keeping their reservoir sterile – meaning it just has nutrients and water and no trace of anything alive.

There are a few other factors that change your pH over time. Your roots give off waste products that affect the pH, and as roots use up nutrients at different rates that can also alter the pH.

However, while buds may fatten up more in the flowering stage due to great environmental conditions at the roots, possibly increasing your yields , they won’t be ready to harvest any sooner after the flip to 12/12. The time to harvest is mostly dependent on strain, and DWC-grown plants take the same amount of time as any other plants to fully ripen and be ready for harvest. (Why Aren’t My Buds Ready for Harvest?)

Why is that? Vegetative plants growing in soil spread out a huge system of roots, then they use those roots to search for and uptake nutrients from the soil in which they live. Roots in soil also need to find pockets of oxygen to prevent the plant from “drowning”(lack of oxygen is what causes plants to droop from being overwatered).

Sirius: Also, I’ve mixed in some pics of my current DWC grow. It’s like a quick timeline of a cannabis plant’s life in a DWC setup.

This is a time-lapse video of the seedlings from the last picture growing over 13 days.

What temperature should my reservoir water be?

How can I easily drain and replace the reservoir water?

Can I mix up the nutrient water in advance?

I personally have found hydroponic plants tend to grow the fastest when the temperature is between 73-80°F, with 75°F being a good temperature to aim for. However, with warmer temps make sure you’re using a beneficial bacteria supplement to prevent root rot!

In any case, after about an hour, you should notice the pH stays more stable (and that’s the pH level you should pay attention to).

When in doubt, always contact your nutrient company to see how far ahead you can make your water! Most major nutrient companies have a contact form on their website and will get back to you in just a day or two. They know their products better than anyone!

As DWC has gained popularity for growing marijuana, we have been receiving lots of questions from hydro growers of all experience levels. Today, I’m going to answer some of the questions we see the most, as well as give you some helpful tips that will make your next DWC grow much easier and more rewarding!

Although I haven’t confirmed this with every hydroponic nutrient company, colloquially, it seems that there is no problem at all with storing pH’d nutrient-water for up to a week as long as the nutrients don’t contain organic ingredients (like guano, kelp, bloodmeal, bonemeal, etc).

Is DWC harder to do than soil?

Most definitely! Just make sure you don’t have electronics/plugs/outlets directly on the ground. This is a rule for all grows, however.

Cannabis Plants Growing With Roots Dangling in a Reservoir of Water.

The plants also get an added bonus of having some of this water pumped over the base of their roots. These two things make it so that your plants will grow MUCH faster than if they were in soil, coco coir, perlite, or pretty much any other medium.

Did You Know? One of the major advantages to Bubbleponics and DWC is actually the air being bubbled up through the water. The bubbles give your roots more oxygen than they could normally get in soil which contributes to getting significantly faster vegetative growth!

The best thing to remember with harvesting is to be patient. A lot of people get too eager to harvest buds, and they end up taking their plants down too early. Wait for a few signs before you take the leap:

Grow Lights:

This Bubbleponics grow guide will show you how to go from planting your seed to actually enjoying your cannabis buds in just 3-4 months using an efficient hydroponic system that fits in your closet. I decided to make a tutorial about growing marijuana with Bubbleponics because I’ve found it is not only one of the best ways to produce consistently huge yields, it also allows for a quicker harvest than pretty much any other grow method!

Simply follow the included nutrient schedule or the custom nutrient schedules listed above (start at half strength and increase as needed) and keep the pH of your water between 5.5-6.5 at the plant roots for best results. Or feel free to use my custom DWC schedule for the GH trio [PDF].

I initially started with CFLs for my first grow. These were great for a small scale grow due to their low setup/maintenance costs and the fact that they don’t give off very much heat. If you’re worried about getting your feet wet in growing cannabis and don’t want to spend too much money, CFLs are a good place to start. We’ve also heard from many growers who have been having success with using the smaller LEDs made for home use.

Here are the General Hydroponics nutrient schedules I use…

Over the years I’ve learned exactly what you need to do to get consistently great results (as well as what doesn’t work), so I decided it’s time to pass the knowledge on!

pH’ing Your Water: After you’ve mixed all of your nutrients and supplements into your water, it’s important to ensure that the nutrient water is the correct pH so your plants are able to properly absorb nutrients.

How It Works:

Reservoir smells bad, roots are brown, weird stuff floating in reservoir water: You may have root rot. If you have brown roots, cut off the brown parts. Replace tank water and add SM90 or Hydroguard to help fight growth. If you’ve been using SM90, don’t switch to Hydroguard or vice versa. Reportedly, SM90 kills all bacteria, so using these two products together is counter-intuitive since the SM90 will kill the beneficial bacteria too.

I hope my bubbleponics cannabis grow guide was helpful! Suggestions, corrections, and feedback are greatly appreciated! Just click the Contact Us link!

You will need a pH kit or an electronic pH tester to test the pH of your water. Most pH kits come with instructions, so you should follow those if they’re available.

$5, and you can find it at Home Depot.

Vegetative Stage:

If you follow the simple steps outlined in this tutorial, you will great yields on your very first attempt! Pros of Growing Cannabis with Bubbleponics:

You can use almost any hydroponic nutrients formulated for cannabis that don’t have organic stuff to clog the pumps, but I recommend the General Hydroponics Flora Nutrient System since it’s simple and relatively inexpensive, yet very effective.

More nutrient suggestions that work well for DWC/bubbleponics:

Nutrients: Since your plants are their sturdiest now, this is the best time to learn how much nutrients they like. You can move closer to giving them the maximum recommended dose and back off whenever you see the tips of their leaves starting to turn brown or yellow. If this happens, empty your reservoir and fill it back with water and nutrients at the previous safe level. With that being said, it’s a good idea to grow by the “If it ain’t broke, don’t fix it” principle if you have some happy looking plants.

Therefore, when you’re making your water, you want to adjust to a pH within the range of 5.5 – 6.5 to ensure proper nutrient absorption .

Growing in a DWC cannabis system isn’t for everyone. But for those that do it well, dry yields of several hundred grams per plant are quite routine. Deep water culture cannabis growing pushes hydroponics (soil-free) cultivation to it’s limits. As such, it’s the ultimate thrill and ultimate challenge for many indoor growers. For those that truly enjoy their cannabis cultivation there are few more satisfying feelings than seeing a crop grow from seed to harvest. When you harvest your first DWC monster the joy and satisfaction will be remembered forever.

But for someone that has only grown in soil before there are some undeniable added new complexities to consider. You will need a, perhaps slightly noisy, air pump to feed the DWC air stone and you may need to discover the joy of owning and calibrating pH and EC meters for the first time.

Many serious growers change the nutrient bath at fixed schedules, often weekly. You may be able to leave your nutrient bath 1-2 weeks between changes in veg. But in bloom, with hungry plants you should aim for complete weekly nutrient bath changes at a minimum. Pro growers may change baths even more frequently than that. They will check their baths once or twice a day in late bloom, topping up with nutrients.

The container is often simply a deep bucket (hence the name, DWC) which is often black in colour. The absence of light keeps dreaded slime and algae to a minimum. One plant can comfortably fill the typical 15-20 litre DWC bucket full of cannabis roots by the end of the grow. A healthy root ball is a huge white mass of roots.

Deep Water Culture (DWC) is the technique of growing cannabis plants with their roots growing in a bubbling (aerated) nutrient bath. Growing cannabis in a DWC system is claimed by many to be the fastest way to grow heavy yielding cannabis plants. However, the technical complexity of correctly maintaining the pH and concentration of the nutrients does place certain requirements on the grower. DWC cannabis growing offers great rewards, but it is far from the easiest grow technique to master.

The benefits of growing cannabis with DWC.

A DWC cannabis grow comes in many different styles and adaptations. However the common theme is that the roots are immersed in a bath of nutrients at an optimum pH, often around pH 5.8. Normally cannabis roots left in water/nutrients would eventually rot. But the presence of bubbling air (e.g. from a DWC air stone, connected to an external air pump) provides the roots the oxygen they need to grow with great vigour.

The main attractions of growing DWC cannabis are the fast growth rates and huge yields that are potentially on offer when DWC is done well. For those that delight in the joy of growing their own cannabis, there is an undeniable satisfaction that comes from seeing a successful DWC grow really push the cannabis plant right to it’s limits.

Above the root-zone the plant grows normally, though with enhanced speed and yield thanks to the optimised conditions in the root area. The nutrient bath will need replacing frequently, especially as the plants mature. As with other grow methods, the nutrients tend to slowly increase in strength as the plant develops.

The most obsessive DWC cannabis growers change the water daily towards the end of bloom, though this would be considered excessive by many. However one primary reason why growers like to keep a fresh bath is because the cannabis roots may not use up all the nutrients and NPK minerals in your DWC nutrient line up at exactly the same rate. That means your nutrient bath could suffer an unhealthy accumulation of certain minerals. This can slow down the uptake of other nutrients. The result is a plant that struggles to grow with the nutrition it needs.

Growing cannabis in DWC system.

Nutrient management in DWC cannabis growing.