How many weed seeds do you need to grow a plant?

Growing

To grow weed, you need high quality marijuana seeds. But how many seeds do you need to grow weed? And then there’s the question: how many marijuana plants do you want to grow? This ultimately determines how many seeds you need. Based on your wishes, you calculate the number of marijuana seeds you need. Use the table: number of marijuana seeds needed to grow.

How many seeds do I need to grow a weed plant?

You might think that you need one cannabis seed to grow a plant. And basically that’s right. But it is possible that not every seed germinates. After all, you are dealing with a natural product. So what if you plan to grow five plants and one or more seeds don’t germinate? Then you won’t achieve the intended yield. It’s therefore wise to use several seeds per plant.

In order to calculate exactly how many cannabis seeds you need, you have to take two determining factors into account:

  • The type of cannabis seeds (regular seeds or feminized)
  • The germination rate

Type of seeds (regular or feminized)

In this blog we assume that you buy cannabis seeds for growing weed. For this you can choose between regular seeds or feminized cannabis seeds. Both types differ from each other and have an influence on the final result. The differences are explained below.

Regular cannabis seeds

With regular cannabis seeds, the genus of the plant has not yet been determined. When choosing regular seeds the chance that the seed will develop into a female plant is about 60%. The chance that the seed develops into a male plant is therefore 40%. And because male plants do not produce buds (read: marijuana), you need several marijuana seeds to increase the chance that you will eventually grow a female plant.

Feminized cannabis seeds

With feminized cannabis seeds you don’t have the risk of a flowering male plant. Because female seeds produce 99.9% of a female weed plant. This is why most growers choose feminized seeds or autoflowering seeds

Autoflower seeds are basically feminized seeds, but have the advantage that they flower automatically (read more about the difference between feminized cannabis seeds and autoflower seeds). However, feminized seeds are more expensive than regular seeds. Depending on your budget and growing skills you will choose the type of weed seed.

The germination rate

In addition to the type of cannabis seed, nature always has an influence on the germination process. After all, the cannabis seed is a natural product and this means that not every seed is viable and germinates. From experience we know that 93% of the cannabis seeds grow into a plant. This is of course a very high success rate, but not 100%. So you will have to use extra seeds in order to have the certainty of eventually becoming a weed plant. We therefore advise you to take into account an average germination percentage of 90% when calculating the number of seeds you need for your cultivation. This gives just that little bit extra certainty.

Reading tip: Our blog about ‘Germinating marijuana seeds’ explains how to optimize the success rate to 100%.

Number of weed seeds needed to grow

Based on the above information it’s quite easy to calculate how many seeds you need to grow weed. For your convenience, we have placed the results in the table below.

Plants you want to grow

Regular seeds needed

Feminized seeds needed

1

3

2

2

5

3

3

7

4

4

9

5

5

11

6

6

12

7

7

14

9

8

16

10

9

18

11

10

19

12

 

Buy regular seeds

Buy feminized seeds

How many marijuana plants can I have?

How many marijuana plants you can grow differs per country. Also, the goal is decisive. Do you grow marijuana for your own use? Or do you have the intention to sell weed? Is it for medical use? There is a tolerance policy in the Netherlands but this doesn’t apply to all counties. We therefore recommend to check our blog: is it legal to buy cannabis seeds?