DIFFERENT POT SIZES
The plants above are both autoflowering Flying Skunk's (with all leaves trimmed) and have been grown under the exact same conditions. The one on the left is a 12L pot and on the right is a 4L pot. Notice the difference in size of the 2 plants.
SIZE OF POTS FOR CANNABIS PLANTS
Choosing a plant pot is an important but often overlooked task. Different sizes and shape of pots affect the way your plant grows in some subtle way.
SO WHAT IS THE IDEAL POT SIZE FOR A CANNABIS PLANT?
It is best to keep your cannabis plants in pots varying between 1.5 – 3 gallons, 3 gallons being the norm (1 gallon is 3.8 liters). If you have a lot of room in your grow space then you may even want to consider 5 gallon pots.
What is the reasoning behind this? Well, cannabis plants grow long winding roots which, if restricted, can become “pot bound”. This simply means that there is not enough room for the roots to develop fully and consequently they will be unable to supply your cannabis plants with all the nutrients they require.
3 gallon pots tend to be the most commonly used. These offer a good balance between pot size and room to grow – your cannabis roots should have adequate enough room for a decent grow, whilst the pot doesn’t take up too much room in your grow room, allowing you to grow more plants in a restricted space.
As previously mentioned, if you have enough room, you may want to consider 5 gallon pots (or even bigger). The drawback is that they take up a lot of room, so it can be fairly restrictive in smaller grow areas. However, if you have the space then it can help with the production of some big yields! (Light, nutrients and other factors permitting). Having a 5 gallon pot allows enough room and freedom for the roots to grow to their full potential. Cannabis tends to do most of its root growth during the vegetative stage and by encouraging huge root growth early on in this phase you set yourself up for some potentially solid yields. By having an abundance of roots towards the flowering phase your plant can take up all of the water and food it could ever need, accelerating the amount it can grow. It should be noted that large pots are an enabler; they do not directly cause better yields, but have the potential to facilitate a situation where it can happen.
You need to make sure that your pots are perforated (have holes in the bottom) and they should rest on small dishes within your grow room. This allows for easier watering; it makes sure excess water can rest in the dish without flooding your pots – you can then remove this excess water from the dishes at will to ensure that your plants do not end up being over watered. You can also opt for putting your pots into large trays which is a more professional approach as you do not have to worry about each individual dish, but makes it harder to empty out excess water.
Make sure to thoroughly clean you pots before bringing them into your grow space, there may be chemical residue or other impurities left over from the shop or factory. It is also important to only put one plant in each pot, no matter what the pot size is. This will stop any need for competition between plants as well as make sure that any problems that may occur are isolated – should the soil in one pot accidentally build up toxic levels of nutrients; it will only affect one plant.
As you can see, the size of your plant pot can have a large impact on how your plants grow. It is most important to make sure your roots have enough room to develop and grow; otherwise you may find that you have a stunted plant. Giving your plant more room than it needs can let it really flourish. However, you must bear in mind, whilst having too little room will definitely negatively impact your plant, having loads of room is not going to get you extra results unless other, more important factors such as light and nutrients are at optimal levels.
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