How To Tell When To Harvest Cannabis Growing In A Greenhouse

If you don’t know how to tell when to harvest cannabis growing in a greenhouse, look for visual signs. Much like any plant in the greenhouse, timing is crucial in harvesting cannabis. Otherwise, the effort you’ve exerted during growing indoors will go to waste. 

Why do growers have to know when to harvest cannabis correctly? A common mistake of new cultivators is doing this too early. The drawbacks you’ll get are that the THC in your plants will not be as potent, but besides reduced potency, the yield will also be underwhelming. 

On the other hand, harvesting too late will degrade the THC in the plants. Overall, harvesting cannabis at the right time will ensure quality yield. This part of the greenhouse cultivation is probably the most rewarding, so why do it without careful planning? 

How To Tell When To Harvest Cannabis Growing In A Greenhouse

Guide On How To Tell When To Harvest Cannabis Growing In A Greenhouse

If you want to know the exact date to harvest cannabis in the greenhouse, it will depend on the strains. Indica will flower for eight weeks, while sativa takes ten weeks of flowering. Both strains will be ready after these periods, while auto-flowering strains are ready ten weeks after seedling. 

However, the emphasis is necessary on the fact that these dates are guidelines only. These numbers will help you estimate and assume when you can harvest cannabis in the greenhouse. The best way to tell that you can reap is by looking at visual signs. 


Visual signs that cannabis is ready for harvest



Cannabis is ready for harvest when the trichomes turn milky white. A good sign that you’re harvesting too early is when they are clear instead of white. If you don’t know what trichomes are, they are the glands on the flowers and leaves. 

Therefore, you will need a magnifying device to check for this part of the plant. As cannabis matures, you can inspect how the trichomes change. For example, they look like crystals when your plant is just starting to flower. 

As time goes on, trichomes will look cloudy. However, do note that flowers are still not ready when trichomes are only half cloudy. When trichomes are mostly opaque, this signifies a high THC level, which is ideal for harvest. 

Remember that cloudy color will produce psychoactive effects, while trichomes that are amber will produce a narcotic high. 



A part of the cannabis plant that wouldn’t need a magnifying object is its leaves. When the fan leaves turn yellow, this can mean that you can start harvesting. Note that the fan leaves are the large and broad leaves on the plant. 

Don’t be confused and think that you can harvest during the vegetative phase. In some cases, the plant can show yellow leaves at this time because of nutritional deficiencies. However, harvest time is getting close when the plant has many flowers, and the fan leaves turn yellow. 



The hair-like parts on the flowers are the pistils of your cannabis plant. When they run red, it indicates that you can start snipping the flowers. You’ll also notice a change in their color as the plant matures.

For example, pistils start as white and turn red, brown, or orange until they are ready for harvest. Do not harvest when most pistils are still white. You want to collect when around 50% of them are red, which indicates the THC levels are also higher. 

Therefore, the more pistils have changed colors, and the THC levels will also be at maximum and cause more physical high. 


How To Harvest Cannabis In The Greenhouse



It’s best to cut one plant at a time from the base. You have the option to harvest them as whole plants or per branches. Please start with the largest leaves so that it’ll be more comfortable to trim the buds. 



You can trim cannabis either by dry or wet trimming. The former is best if you have full control over the humidity level, and you want to preserve the smell and taste, while wet trimming is best if the humidity level in the drying room is very high. Wet trimming also improves air circulation, which prevents the risk of fungal diseases.



For drying, tie the leaves at the base of the main stem in an upside-down direction. It will take around 15 days for the buds to be dry. To help with the process, maintain the room dark, and monitor the temperature at 64.4 to 73.4°F.

Afterward, you can improve the quality of the flowers by curing in an airtight glass jar. You will let them breathe for 10 minutes for the first three weeks. Maintain the storage room at 68°F and 50 to 55% humidity. 

Ventilation stops at the 6th month, and the flavor and aroma will get milder in the 8th month. 



More than marking your calendars for the expected harvest date, growers must know a more reliable way to indicate harvest. How to tell when to harvest cannabis growing in a greenhouse? Use both your naked eye and a magnifying tool. 

The trichomes, leaves, and pistils are essential parts of the plant that can give you telltale signs that it’s time to harvest cannabis. Growing cannabis in the greenhouse already helps in ensuring quality and high yield. But harvesting at the right time will also affect your output. 


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How To Prevent Root Rot In Hydroponics: 3 Useful Tips

If you’re a newbie gardener who’s looking to find ways to hone your skills, you’d want to learn how to prevent root rot in hydroponics even before this problem affects your plants.

Hydroponics can be advantageous to crops in more ways than one. However, it also comes with risks of diseases, such as root rot, which can be destructive or even lethal to your plants.

Unfortunately, there are no effective methods to recover the wilted parts that were affected by the root rot once it hits your plants. The only thing you can do if you do not want this catastrophe to befall your crops is to prevent it before it happens. Read on to learn more about this subject.


What is Root Rot?

Root rot is a disease that attacks the plant roots and causes them to suffer decay. This usually happens when a lack of oxygen supply occurs in the substrate.

To give you an idea, think about plant roots that are submerged in water that only has a little oxygen in it. Over time, the plant suffocates and dies.

Aside from rot and decay, this disease also leads to the proliferation of fungi that are naturally present in the soil. These include Rhizoctonia, Alternaria, Pythium, Botrytis, Fusarium, or Phytophthora. As soon as fungi colonies start to grow, they tend to target the weakened roots and infect your precious plant babies.

Once the plant becomes infected, they won’t be able to take in what they need to grow – water, oxygen, and other nutrients. When this happens, it won’t be long before the plant dies.


What is Hydroponics?

In case you’re not aware, the term hydroponic is derived from a Latin word that means “working water”. To put it simply, hydroponics is an art that involves growing various types of plants without soil. If you’re like most people, the first thing that comes to mind when somebody talks about hydroponics would be a picture of plants with roots suspended into the water without using any type of growing medium.


Avoiding Root Rot in Hydroponic Systems

Detecting and identifying root rot can be tricky. When your plants get infected, their leaves and roots gradually wither until the whole crop itself dies from the lack of nutrients, which is a common symptom of many diseases.


What causes root rot in hydroponics?

One of the requirements in hydroponics systems is oxygen. Without it, your plants are basically on the road to death. On the other hand, lack of such is one of the major triggers for root rot, and it must be avoided at all costs.

Just like when planting in soil, you loosen up the ground so that your plants’ roots can have their required intake of oxygen. That is the case for crops grown in aqueous solutions as well. If they cannot breathe, they would not be able to grow.

Another agent for root rot is the temperature. The last thing you would want in your system are parasites that leech nutrients intended for your plants and infect the water during the process. In common terms, these fungi are called molds.

One of the best breeding grounds for these is warm and moist areas. For this reason, if the water temperature inside your reservoir is high, then you are susceptible to it. Something as minor as letting the solutions exposed to sunlight can already be a risk factor.


3 Useful Tips on How to prevent root rot in hydroponics

There is good news! Root rot in hydroponics can be prevented! Just follow these tips:

Tip#1: Use the right air pump

If you do not want root rot to affect your plants, you merely have to avoid its causes. If you need oxygen, keep the water bubbling by providing an air pump of appropriate size, and also give importance to proper ventilation in the room.


Tip #2: Maintain the temperature

The temperature should be maintained within the 70 to 80 degrees F range. Get rid of any materials that can make your system vulnerable to infections, and make sure not to disturb your crops while they are trying to grow.


Tip #3: Get rid of the rotten parts

However, if you failed in preventing the disease, then the rotten parts should be removed immediately. Cut them off as there is no chance of reviving them, and focus on the potential new growth instead. Fix your hydroponics system and eliminate the risks.


Why Give Greenhouse Gardening a Try?

Greenhouse gardening offers numerous benefits to greens aficionados who dare to take their gardening experience to the next level. Aside from acting as a shield against the effects of inclement weather, a mini, hobby, or semi-pro greenhouse can also serve as a protective layer that keeps harmful bugs and critters at bay.

What’s more, its enclosed structure allows you to control your plants’ growing conditions including the temperature, light, moisture, and ventilation of the greenhouse’s internal environment. With a controlled environment, you’ll be able to extend growing seasons and grow plants that aren’t native to your area.



No matter how well-informed you are about how to prevent root rot in hydroponics, you cannot completely eradicate the risks. Therefore, to avoid the worst-case scenario, you should be prepared to sacrifice the infected for the sake of others. While you’re at it, consider trying your hand at greenhouse gardening as well.


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