Here is a list of strains by Royal Queen Seeds that can tolerate nutrient/pH fluctuations well:
While some cannabis cultivators simply grow plants in soil, others look into more elaborate growing techniques, such as hydroponics. Deep Water Culture (DWC) is one method of growing cannabis hydroponically that can have many advantages. Find out what makes a DWC grow so rewarding, and how you can set up one of your very own!
Simpler systems for single plants may consist of one reservoir, a small pump, and an air stone for one plant. Due to the dramatic growth of a plant in a DWC, a small, single-plant DWC system could be sufficient to fill-out a small tent in just a few weeks.
Recirculating DWC systems make use of one large tank that is connected to a number of individual smaller reservoirs for each plant. The feeding solution is fed from the large tank to each of the plants, and is recirculated back into the tank. Some systems may just have one air pump and an air stone in the large tank, while others may have an air stone in each container for each plant. Air stones create bubbles to ensure proper gas exchange.
When selecting strains to choose for your DWC grow, you may want to opt for plants that have tried and tested success in hydroponic grows.
Your cannabis plants need oxygen to grow, which makes the air pump in your DWC a most critical component. In fact, many growers keep a backup emergency air pump should one stop working. Understanding that just one day without a working pump could likely kill your crops, having a backup pump will be smart and provide you with peace of mind.
Too many fertiliser salts can obstruct nutrient uptake and cause wilting. Use the DiST 4 Pocket Conductivity Tester for accurate readings.
As a general rule, you should get an air pump that can supply at least double the litres per hour of the volume of your reservoir. For example, if you have a 100l tank, get a pump that can supply 200l/hour. Know that an air pump costing you no more than a few euros will likely not last a lifetime, so get the backup pump as well. And while you’re at it, also get some more air stones. It’s always better to be safe than sorry!
In well-sorted grow stores that carry products for hydroponics, you can get so-called “net pots”, which are suitable for DWC systems. As compared to normal planting pots, these pots have a wide mesh so that the roots can easily reach the water below.
Deep Water Culture is a great method of growing cannabis hydroponically. Learn all about DWC and be rewarded with fast growth and extraordinary yields.
Here’s what’s inside! Since the cannabis roots get everything they need without having to “search” for it like they would in soil, you end up with faster vegetative growth rates. This growth is supported by huge masses of happy, healthy roots like this!
That being said, a grower can shave 1-2 weeks off of a grow with top-feeding, which makes the beginning stages a lot more exciting (and saves time / electricity)!
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).
What is Top-Feeding?
Do I really need to check the pH?
Unrelated Tip: Exhaust fan too loud? Try hanging your exhaust fan from inside the tent instead of setting it on top; this will greatly reduce the amount of noise!
Yes, it’s absolutely necessary! Your plant roots still need air, and without an air pump they will drown. Plant roots need oxygen, and the heavily oxygenated water in a DWC reservoir is a big part of why hydroponic plants grow so fast!
Buds are forming on the army of branches we made!
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).
Deep Water Culture (DWC) means growing your plant with the roots in a bubbling reservoir of nutrient water. This perfect root environment is what gives DWC-grown plants their remarkable growth speed!