The ideal cannnabis pot size and type of pot you should choose will ultimately depend on how large you want your cannabis plants to grow. Find out how many weed seeds you should be using per pot to ensure a healthy and bountiful cannabis growing experience!
Ultimate Guide to Cannabis Pot Size
Does cannabis pot size affect plant growth? You bet it does! Container size makes all the difference for a good harvest! The right size container is the first step toward successful grows that thrive and flourish.
But how do you determine the right size? What are the advantages of one size over another? Choosing the correct sized pot isn’t as easy as it seems. In fact, it can be quite difficult and confusing.
The right choice depends on several factors. How many cannabis plants do you plan to grow in containers? Do you plan to use a grow tent? Will you grow indoors or outside? What marijuana strain will you grow? How much available space do you have for your cannabis grow containers?
Don’t worry and read on! Take advantage of this article to learn how to choose the best grow containers for your needs.
Cannabis Root Needs
First, let’s talk about what a pot is meant to protect—the roots.
During the germination of a marijuana plant, the first thing that emerges from cannabis seeds is the plant’s central tap root. As the cannabis plant grows, roots and tiny hairs branch off of the central root. A healthy marijuana plant will develop an underground structure that’s similar to the structure of the branches that are above ground.
Although you don’t see your cannabis plant’s roots, they require just as much care and consideration as the leaves and flowers. Cannabis plants breathe and absorb the nutrients they need through healthy root systems. They are fed through the plant’s roots.
So what do cannabis roots need to make plants thrive? Primarily, room for the plants to grow, proper draining, and no competition for nutrients.
Room To Grow
More than anything else, marijuana plant roots need enough space to grow properly in their environment. This is especially true in the vegetative stage of growth. Root growth in the vegetative state is directly related to the plant’s ability to manage water and nutrients in the flowering phase.
If the container doesn’t have enough room, the roots become tangled together. This is known as “root bound” (or sometimes “pot bound”). In pot bound plants, root development and growth is inhibited. If that happens, your marijuana plants won’t get the nutrients they need. This can lead to nutrient deficiencies and lower yields. Make sure they have enough room if you want big yields!
That said, there’s such a thing as too much room. If your marijuana plant is in a larger pot than it needs, your soil will stay wet. If you soak your plant, they are susceptible to root rot.
To support healthy roots, your soil should stay a little wet. It should never be soaked. Make sure your soil dries between each watering. It should retain just enough to keep moist and not be completely dry. No overwatering! Waterlogged soil, excess water, and moisture can eventually cause root disease. Cannabis pots need good draining to keep dry. Get rid of all the moisture.
Marijuana growers should avoid using the wrong containers. Avoid containers unless they’re designed specifically for growing plants. A Solo cup might seem like a cheap solution, but when your crop fails and your plants die because of runoff water, you’ll see that isn’t the case! And although a pottery bowl is pretty, it won’t look so great when it’s holding a dead shrub covered with pests!
Pots designed for growing have drainage holes in the bottom to manage water. Containers that are fabric pots or plastic pots that have holes everywhere are even better. You don’t want to waste time drilling holes in pots that weren’t designed for plants!
Place large trays or saucers under the pot to collect any excess water that drains out after watering. Some people use a matching saucer or trays that match the size of the pot. The shapes aren’t an issue as long as you ensure that you catch the water runoff!
If it’s not impossible, install a drainage system so that your plants never sit in stagnant water. If you can’t setup a drain, empty the runoff water from the saucers after each watering. You don’t want excess moisture in your garden from water runoff!
Never put more than one weed plant in the same pot, no matter what size it is. Each plant should be contained in its own pot. If more plants are in a pot, the roots compete for the nutrients you pour in the pot. With this method, none of them will reach their full potential.
There’s another good reason to set a limit of one per container. If trouble occurs in one container (for example, build-up of toxic nutrient levels), you’ll only lose one plant.
What Cannabis Pot Size Should I Use?
Now that you understand what cannabis roots need, you can see why pot size is so important! But what pot size is best? Your marijuana plant will live in two or three separate containers during its life. You’ll use different pot sizes (in gallons or litres) each time.
One thing to remember is to start small with seedlings. They need large amounts of pampering to begin the best way. During the early stages of growth, sow your seeds in a seed starter kit designed for baby plants.
Most starter kits for cannabis seeds have an insert with several small cells. Put your seeds in one cell each. The kits also have a humidity dome with an air vent and a tray at the bottom to collect excess water.
You can’t go wrong by purchasing a pack of 5 or 10 trays at the Amazon market place website. It won’t cost much money. Put it in your cart for less than $10.
Don’t forget the importance of the right media for your cannabis seedlings. To avoid stressing your marijuana plants, always decide and start with the media you’ll use during your plant’s life. If you choose to cultivate in rockwool, start with rockwool. If you choose to cultivate in soil, start with soil. You can use any form of media in a seed starter kit.
Seedlings are ready to transplant to a larger container when several white roots come out. If there are only one or two, the seedling needs more root development first.
Transplanting success is closely tied with how quickly you deliver them into the containers. Work quickly! A good process is key. The tiny, exposed hairs will desiccate if they are exposed for more than two minutes.
Transfer the young plants to fresh soil in clean containers. Sprinkle some mycorrhizae fungi on the fresh soil before you transplant. The overlooked task of adding microorganisms will really help!
The first time you transplant, move your cannabis plant into a 2 to 5 gallon pot. How do you decide the right pot size? Which pot sizes are correct? Here are some things to consider:
- Will you grow indoors or outdoors? If you’re growing inside, use a small container. If you’re growing outdoors, the sky (literally) is the limit! You won’t be limited in any way. That means you can use large pots when growing outside.
- If you’re growing marijuana inside, how big is your grow space? A full-grown adult cannabis plant takes around four square feet of space. That’s a lot of space—especially if you’re growing marijuana in a small space like an indoor grow tent. It’s vital to have easy access to your garden. Don’t let large pots get in your way. A grow tent pot size should be around 3 gallons (11 liters). You can reduce the size of your weed by limiting how long you keep it in the vegetative stage of growth. If you want to do that, go with a small pot or small pots. If you have more room, use large pots or a large container.
- What strains will you cultivate? Sativas tend to spread out a lot more than indicas. Since the cannabis plant root structure is similar to its branch structure, a sativa strain needs a bigger pot than an indica plant. Smaller plants need smaller pots.
- Do you want to maximize yields? If you want to produce as much weed as possible, you’ll need bigger containers to hold your massive plants!
- How much can you lift? If you’re not strong, use a small container. It needs to be light enough to pick up and move. You can’t do that with a heavy weight.
You may wonder about the vegetative cycle for 1 gallon pot vs 3 gallon pot. How long to veg in 3 gallon pots? 30 to 35 days (5 weeks). How long to veg in 1 gallon pot? 2 or 3 weeks (14 to 21 days).
Can you flower in 1 gallon pots? You can, but it’s not a good idea. The smaller the pot, the faster growth cycle you should have. Note that when flowering in 1 gallon pots, the Screen of Green method is recommended. With big pots, you can veg as slow as you want.
Outdoor growing gives you the freedom to do what you want. If you’re growing outdoors or in a huge indoor grow space, you aren’t limited at all! You can let your cannabis plants grow as huge as you want (at least to the extent you can handle).
How Many Weed Seeds Per Pot Should I Use?
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Although the answer is quite simple, it’s often a common question when you’re getting into growing cannabis.
How Many Weed Seeds Do You Use In A Pot?
You only need to use 1 weed seed per pot of cannabis you’re looking to grow. A single cannabis seed will lead to one plant, and you don’t want multiple plants in a normal-sized growing pot because they won’t have enough room to each grow which will lead them to compete against each other for resources.
By sticking to one cannabis seed per pot, you give your plant the best chances of growing big buds in a healthy manner.
Along with this, if you’re planting multiple cannabis seeds in one pot it increases your risk of plant disease and issues such as spider mites which can effectively destroy your grow before you even get to harvest.
So no matter if you’re looking to grow cannabis in your closet or you’re looking to grow cannabis outdoors, you need to stick to only one weed seed per pot.
Cannabis seeds are too expensive to have some of them die as they’re trying to grow. If you are looking to purchase cannabis seeds take a look at our guide on how to buy cannabis seeds online and get them delivered straight to your front door!