To start using nitrogen during the growth phase you’ll need to wait for your little plant to grow the roots out enough so that it becomes slightly stronger. It won’t need much more than some humidity to germinate and grow during the first few days, but once it begins growing aster then you’ll need to start using a growth fertilizer.
Once the female flowers begin showing then you’ll need to begin using flowering fertilizers. Just like in the growth period, you’ll need to start off little by little until you reach the maximum milliliters stated by the fertilizer manufacturer, alternating between pure water and fertilizers.
Each brand has a different range of products, so depending on the brand you go with you’ll need to use more or less products for both growth and flowering, although in this article we’re just talking about WHEN to use them.
For the rest of the grow, regardless of what products you use, you will need to use them on every second watering or else you’ll burn out the roots. If you notice the plant getting yellow then you can use fertilizers twice in a row, but if it gets a dense dark green color then you’ll need to lay off on the fertilizers for a couple of waterings.
Depending on the phase your grow is in your plants are going to need certain nutrients in higher proportions; they need more Nitrogen in growth, and phosphorus and potassium for the flowering period. Cannabis plants absorb large quantities of these nutrients as well as others, so if they don’t get them through irrigation then they’ll probably end up showing deficiencies through stains on the leaves.
If your chosen range of liquids has a fattener with a high PK you’ll need to use it during the last phase of the flowering period, the fattening period.
If you buy a product with root stimulants in it then you should use it during the first two growth weeks and for two weeks after every time you transplant. If you have a flowering stimulant then you’ll need to use it once you flip the lights to 12 until the first flowers start appearing.
You should begin off with small dosages; if your product says 4ml/L for adult plants then you need to start off with 1ml/L, and only begin using it once the leaves on your plant have three points. Once those leaves appear you can start using your growth fertilizer in the irrigation water. Once the plant begins growing more then you should raise the dosage until you reach the maximum milliliters allowed, and always use it with every second watering.
In this article we’re going to talk about when to start using fertilizers with cannabis. People always ask us when they should start using fertilizers on their plants, but honestly it depends on your grow method, the strain and the phase that the plant is in.
Today we're going to talk about when to start using fertilizers with cannabis; depending on the phase your plant is in it will need certain nutrients.
Flower (N-P-K: 4-6-7)
There are various other scales or measurement systems used to measure the EC. These are called CF (conductivity factor), ppm (parts per million), and TDS (total dissolved solids). North American growers tend to use ppm and European growers use EC.
Container plants receive mild feedings with a liquid flowering fertiliser and EC 0.8-1.0 mS/cm.
Fertilising belongs to one of the most important gardening duties – especially outdoor and, of course, in hydroponics too. Yet many cannabis cultivators do not know when the right time is to fertilise, how much to use, or how often. This is in part also caused by the lack of information supplied by the companies selling the fertiliser. To further complicate matters the recommended dosages are often quite confusing and tempt customers to use large amounts of fertiliser! If cultivators lack experience or, despite a good amount of gardening knowledge, they cannot find the cause of certain plant symptoms, it is very likely that they are constantly over-fertilising the plants.
Mandala Seeds is the first seed bank to introduce the concept of “nutrient efficiency” and breed with this goal in mind. Nutrient efficient plants have the ability to assimilate and fertilisation nutrients quickly, efficiently, and naturally. This enables amazing stress-free cultivation if you are not going to interfere with this natural potential. The vigour and robustness of our strains ensures that mistakes can be forgiven. Mandala plants can bounce back quickly if there is a period of deficiency or drought. Over-fertilisation also does not kill them as quickly as with weaker genetics.
Terra Flores (N-P-K: 10-9-19)
CANNA AquaVega & AquaFlores (Hydroponics)
GENERAL HYDROPONICS FloraNova Bloom (Soil/Hydroponics)
There are organic and mineral based products in powder or granular form.
Marijuana Cannabis Cultivation and Fertilizing Guide