With FIMming, you remove any new growth while avoiding any cuts between the nodes, whereas with topping, you cut off the top of the plant altogether. Many cannabis growers choose to FIM their plants because it all but guarantees them a larger yield. This is because FIMming allows the plant to produce four colas at once, in comparison to topping which produces only two. FIMming also does not cause the plant as much stress as topping and allows for a quicker recovery.
This is highly beneficial, as FIMming can be performed multiple times, allowing for huge harvest potential. Another benefit is that it enables growers to control the canopy of their plants, keeping it balanced for optimal growth. FIMming is a high-stress training (HST) method used by cannabis growers to maximize their final yield and is the act of pinching or cutting a young plant during its vegetative cycle to create more colas. To begin with, you’ll need a plant mature enough to handle the process and a pair of sharp pruning scissors/a sterile blade. To prevent any potential contamination at the cut, remove any loose stalks beforehand. It is advised to FIM when the plant is still young, with 3-5 nodes in total. You should aim for a clean cut at the top of the plant where there any new growths, avoiding cutting between nodes (compared to topping, in which you’d cut the top off the plant between nodes). It is essential that you monitor your plants after FIMming, as it will begin to create other stalks that will grow out and produce large, dense buds. Unlike topping, FIMming doesn’t stress the plant as much, resulting in a quicker recovery time. There are many factors to consider when choosing which HST techniques to use.
As both have their pros and cons, it’s for you to decide what will best suit your needs. For example, FIMming is better suited for indoor or micro-growers with limited space, as it allows them to maximize their plant yield. Conversely, topping is preferred by outdoor and large commercial growers, as they will usually top a plant multiple times to produce a strong, bushy weed that will require less support than those that have been FIMmed. Creates 2 main colas at a time at the top of the plant. Topping is stressful for a young plant and recovery time is longer than that of a plant that has been FIMmed. Topping can be performed to reduce the vertical height of a plant during its vegetative cycle. Forms a large, bushy structure that will require less structural support than FIMmed plants. Removes the newest growth without cutting between the nodes. FIMming is less traumatic to the plant, allowing for quicker recovery time. Creates four main colas at once, whereas topping only creates two. Perfect for growers with limited space, as the plant will begin to grow laterally instead of only vertically. Topping and FIMming both entail the removal of some growth at the top of a young cannabis plant, and both result in the development of extra colas. Here are some tips for topping and FIMming that will make your growing experience even more successful. Topping or FIMming a plant too soon means it can have a difficult time recovering. This is a common mistake growers make when first learning, and it often holds people back from getting the most from this technique. As a rule of thumb, wait until 4-6 nodes are shown when topping and 3-5 when FIMming. If your plant is growing new leaves every day, it’s ready to top or FIM. As a result of rapid growth, its recovery time will be noticeably faster. Any technique that involves the cutting or pinching of your plant should be done during the vegetative stage, long before any signs of flowering. Make sure to use clean and suitable equipment, as contamination is the last thing any grower wants. To ensure your plant goes into flower in the best possible shape, use either Topping or FIMming to give it a good shot at growing multiple, large, dense flowers. The best growers understand the need for high-stress training – as painful as it can appear – to help your plants grow into their best possible version. With these techniques, it’s amazing what can be achieved with just a few strategic snips. Cutting Cannabis for Better Structure: Topping & FIMing. Topping and FIMing are two cannabis plant training techniques that involve “pinching” or cutting off some of the top growth.
These techniques are designed to give you a free way to achieve better plant shape (to make better use of the available light), create more colas, and achieve bigger yields. FIMing : Remove newest growth (but don’t cut between nodes) All plant training techniques are designed to help growers get a more desirable plant shape and bigger yields without changing other aspects of their grow. For example, cannabis plants don’t naturally grow in a way that takes full advantage of indoor grow lights – a lot of light is wasted indoors when cannabis plants are allowed to grow naturally without training.
Because of this, cannabis plant training techniques (like topping and fimming) are especially effective at increasing yields in indoor grow setups.