Hydroponically grown cannabis requires a more thorough fertilizer system than the soil grown ones. Basically, the water becomes the medium of the nutrients to sustain the plant’s growth and we cannot either under do nor over-do it. Under do it and your pots will not reach its optimum growth; over-do it and that too much synthetic chemicals can defer or affect the pots’ normal growth, not unlike the soil grown which can just disperse that extra chemicals around the area.For small time hobby growers out therewho want to do their own pre-mixesor large scale producers who want to produce their own customized liquid fertilizers rather than go to a store and buy expensive ones, here’s how.
How to Prepare you Pre-Mixes?
There are 16 basic elements that the weed needs in order to grow but I want you to just concentrate on the first 3- N, P, K which stand for Nitrogen, Phosphorus and Potassium (though of course you have to make sure that all the necessaries nutrients should be present).There are a few mixes for volume-volume and powder-volume ratios: 1 part liquid, 2 part liquid, 1 part powder, 2 part powder and 3 part liquids. Adjusting your formula for specific growth phase is also advisable. So how do you mix it? You have to have the basic chemistry knowledge in order to do this. Try to find out what specific nutrient will be affecting the what-function of the plant and then you can follow a simple guide that you can search in the internet- please take not the number of plants, the variety especially the formula that you will be using. You have to know a bit of chemistry and some of the basic lab equipment in order to perform the mix. (beaker, weighing scale, etc.) .
Why Do You Need the Right pH in Relation to Your Pre-Mixed Nutrients?
pH determines the efficiency of how those nutrients will be absorbed. The pH scale indicates levels 1 to 14, 1 to 6 indicating an acidic medium whilst 8-14 indicates a basic medium and 7 being the neutral pH. In growing cannabis plants, although there are many strains and varieties, it is recommended to stick to 5.8 to 6.5 pH level, a relatively acidic medium.
You can measure pH by using a pH pen that costs around $60 per piece. If there are any discrepancies in the readings, you can adjust your actual pH to the recommended level by using a few acids like sulfuric, nitric and phosphoric acids. For lifting the pH use some basics chemicals like Potassium Hydroxide, Sodium Hydroxides. You should also take caution in adjusting pH levels. Every milliliter you add can change the numbers exponentially, so wait at least 20 minutes before you take your reading and start readjusting again.
Another tip: When mixing acids and water. Add the acid to water and not the other way around.