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Curious beginners ask the most amusing questions in many subjects: How much cannabis can you get from one plant? An answer can be found when this question becomes more specific: Which strain and how big is the plant when flowering begins? How many watts per square meter? How big is the pot? What growing medium is used? How much space does the plant have? Is everything done correctly during the flowering phase and beforehand?
You Could Also Ask: How Much Water Fits Through a Pipe?
To put it more generally: From one plant you can get 5 grams or over 5 kilos. Jorge Cervantes likes to report about outdoor growing in California. There are certain regulations that patients may only grow a few plants. Therefore, many patients try to get a lot of marijuana from few plants. They start very early in the year and use artificial light to extend the days so the plants stay in the vegetative phase. In summer, the soil is covered so it stays cooler in the sun and the plants continue working.
The plants grow 4 to 5 meters tall, just as wide, and they seem to yield well over 5 kilos of marijuana.
Due to a translation error, at least one source mentions over 90 kilos, but this cannot be correct. These monster plants are harvested in at least three phases, each time about 50 cm, to allow the inner levels to continue ripening.
But even with a normal outdoor grow, over 500 grams from a large and good plant is conceivable. However, if an autoflower is grown, this plant won’t get that big in the first place and you can expect maybe 10 to 100 grams. This also depends on the strain and whether the plant finds optimal conditions or doesn’t develop properly. If a plant doesn’t develop properly, harvest yields can also be under 10 grams or completely absent.
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Rules of Thumb for Harvest Yields
The figures refer to dried marijuana buds that won’t get sticky even in a jar. Whether seeds are included or not makes no significant difference to the harvest weight. However, it makes a significant difference how much active ingredient content is contained in the harvest yields and how pleasant the smoking experience will be.
For the answer to maximum harvest yield, you cannot start from plants, since one plant can fill more than one square meter, while some also place 36 plants per square meter. You also cannot say that 500 grams can generally be calculated as harvest yields from one square meter. There are Haze strains that not only need three times longer for flowering, tolerate far less fertilizer, and grow larger than other strains. Despite these factors, you will still only harvest half the amount per square meter or less. Many say it’s worth it though.
From highly bred marijuana strains, you can assume that you can achieve 500 grams per square meter or even more as harvest yields. However, everything must be done correctly. The right plants must go into flowering at the appropriate spacing and size and be optimally cared for. Many have good starting conditions, only achieve half, and are already satisfied with that.
Incidentally, similar harvest yields per square meter can be achieved outdoors. Even taller plants eventually cannot extract more from sunlight because they shade themselves. There are thus certain limits that cannot be derived from the number of plants, but from the conditions of a growing room and the grower’s skill. With autoflowers, it may be more difficult to achieve maximum harvest yields. However, the plants are easier for outdoor growing.
Conclusion on Harvest Yields
It’s great when you come close to the theoretically possible harvest yields. After all, especially under artificial light, you should work purposefully to have at least used all that electricity well. However, the specifications from seed banks are top values to have an advertising effect. If, for example, 50 to 150 grams or more are given as harvest yield per plant, these are large plants. Anyone who repeatedly achieves half of that per plant or per square meter and regularly achieves a bit more is already very good.
Many don’t even want the marijuana strains for high harvest yields; they prefer strains that taste delicious, have excellent effects, and are simply more beautiful. There are THC strains with over 20% THC, which are naturally great if you want to produce a lot of THC. For smoking, however, other varieties with less THC are sometimes considerably more interesting. For Haze lovers, the harvest yields per square meter are sometimes completely irrelevant if they can harvest the right Haze.
Strains that are marketed as Haze and finish in less than three months flowering time are crosses of Haze into faster-maturing plants. Here you can again achieve high harvest yields. But this is not enough for many Haze lovers who prefer to grow and especially smoke original Haze strains. However, you must be able to grow well to keep the more sensitive Haze strains optimally alive and growing for such a long time. Many also grow faster strains for this reason, to have less time for mistakes.
Flowering time should also be considered with harvest yields: If the Haze with 6 months flowering time brings 50% of the harvest yields of a strain with 2 months flowering time, then you actually have not 50%, but over 80% less to expect as gram results. The possible harvest yields should therefore be viewed very relatively and you should already see it as success to achieve half of what is theoretically possible.
