Table of Contents

How to Make the Best Solo Cup Challenge

Mike Wilson
Mike Wilson
cover photo

One of the latest trends in cannabis cultivation that has become very popular is the “solo cup challenge”, a form of marijuana cultivation that consists of growing weed plants in just one cup. This grow style has become popular with growers who are short on space and want to maximize plant yields and harvests as plants can achieve huge bud yields with this grow style.

Guide to making the best Solo Cup Challenge

To make a good Solo Cup Challenge, you need to follow a few steps that are very simple to achieve absolute success in cultivation.

Step 1:

Select the cups in which you are going to grow. In general, 500cc is the most ideal because the plants tend to grow correctly without producing many lateral branches, few leaves, and a large, central bud.

Step 2:

Select the correct genetics to be able to grow in the cup. You should preferably choose a single variety to maintain a homogeneous crop or a single type of genetics such as indica or sativa.

One of the advantages of growing autoflowering varieties in this format is that its compact size takes up less space which means that in small space crops, you can put many more plants and maximize the production of buds per square meter.

Step 3:

For this type of cultivation, as for SOG cultivation, it is recommended to use LEC type lighting because it provides the best spectrum to weed plants in this cultivation format. However, you can use any type of lighting that is beneficial for plants such as HPS, LED, or others.

What is essential is that the plants have a certain distance and respect for the lighting so that they do not spike and so they can produce the powerful central bud that is so desired. On the other hand, if you put the lighting at the corresponding distance, you will prevent the plant from being damaged as the intensity of the light can generate stress, burn them, or cause other types of damage.

Step 4:

Regarding the substrate and fertilizers, in this type of crop, you can cover the needs of the plants with the least amount of resources. In fact, the money saved in terms of substrate and fertilizers is greater. We say this because the plants require the minimum doses of fertilizers in these cases and the amounts of substrate that are used are smaller.

Step 5:

Once the seeds are germinated, you can start putting them in the cups that must be filled with substrate. Remember to maintain a certain amount of humidity in order to enhance the appearance of the seedling from deep in the earth. In the first 2 weeks of the plant’s life, water with a spray-type water spreader so that the plant does not suffer from excess water. In addition, due to the smaller size of the container, it may require water more often as it grows.

Step 6:

In relation to humidity and temperature, try to maintain the levels that are used in a standard way in the cultivation of cannabis in order to avoid the appearance of fungi and pests that damage the crop. In addition, it is always good to have a thermo-hygrometer with which to measure these variables.

humidity temperature

Also, inside the crop, you must have an adequate ventilation system with extractors, fans, and filters so as not to have dirty air inside and avoid problems with the odors of the plants when they are in bloom.

Step 7

When the plants are large, they will reach approximate measurements of 30cm to 50cm, the average being about 40cm. At this point, you must be careful with the lighting and regulate the distance in relation to the height of the plants.

step 7

Here, you can also do some cleaning on the plants before they start flowering, that is, removing the lower branches that only produce small buds that will reduce the final harvest. On the contrary, what we are looking for with this type of cultivation is to produce a large, robust, and heavy central bud which will be produced if we make the plant focus all of its energy on it.

Step 8:

As this crop is done in tiny containers, you can experiment with doing a little washing of the plant 1 week before flowering begins. This will allow the extra growth fertilizers and salts that accumulate in the soil to be released. It will also cause the plant to look for the food it needs in the substrate when it goes to flowering. Therefore, when you water the first few times with flowering stimulants and fertilizers, the plant will consume a greater volume of nutrients.

Step 9:

The plant advances in flowering at this point. If you wish, you can complement the lighting of your indoor crop with UV-type lights. This makes the buds much more powerful because it stimulates the production of THC. If you decided to put a large number of plants in your grow room with the Solo Cup challenge, make sure that the fans blow air towards the plants and their buds. This will help you achieve better aeration for the specimens and avoid problems.

Step 10:

The harvest has arrived. Here, you must cut each of the seedlings to pass them to dry. Remember to dry in a dark and dry environment so that the buds do not fill with fungi or similar pests. Also, there should be a good distance between each plant when they dry so that they do not rub and damage each other. After this, we manicure the plants when they are already dry. We can do this after about 3 weeks of drying.

To finish, we must carry out the curing of the weed plants in our classic glass jars. Make sure that the harvested plants are dry enough and do not overfill the jars. It should only occupy 1/3 of each container to avoid fungi that damages the harvest.

The best genetics to grow in A Solo Cup Challenge

There are always good recommendations for growing, whether in large pots, directly in the ground, or in small containers as is the case with Solo Cup Challenge. So, here, we share some of the best genetics that we recommend for the Solo Cup Challenge. These recommendations come directly from growers who have already done this type of crop, therefore you can have guaranteed success on this side. The rest depends on your work.

Blueberry x Jack Herer auto

Blueberry x Jack Herer Autoflowering is a perfect variety to do the solo cup challenge because it is easy to grow and fast to grow as it only needs 49-56 days to produce delicious buds with sweet, fruity flavors with spicy and woody notes.

In addition, the compact size of this variety makes it suitable for small growing spaces, producing between 170 – 200 gr/m2 when grown indoors and about 90 – 225 gr/plant if grown outdoors, achieving buds with rich resin and a potency of 14% – 18% THC. As it is a hybrid variety, you can apply LST-type cultivation techniques to help it extend its lateral arms. Organic nutrition is also great for stimulating microbiotic life in the substrate.

You will definitely find the best autoflowering strains to grow here! Blimburn Seeds has been working hard for years to offer all growers high quality, stable genetics with a germination rate over 90%. Check out our Best Autoflowering seeds online selection.

Gelato 41

Gelato 41 is a mostly indica variety that produces compact buds full of resin in just 8-9 weeks of flowering with rich flavors that are a mix of berries, sweet notes, and aftertastes of pine, wood, and citrus. It is quite an experience for a user’s palate.

Gelato 41

Gelato 41 is recommended by gardeners to make a solo cup challenge because its compact size makes it easy to grow. From here, we tell you to avoid excess fertilizers to maintain its original flavor. This plant has short nodes and rock-hard buds, so we suggest that you have good ventilation with excellent air circulation to avoid fungal problems. With these measures, you will be able to achieve 450-550 gr/m2 indoors of incredible flowers that reach a potency of 24%-29% THC, while outdoor growers can harvest super heavy yields ranging from 550-700 gr/ plant.

Northern Lights x Kush Fast Version

We already talked about Northern Lights in this post and now it’s time to recommend this incredible Northern Lights Kush Fast Version, a small-sized variety when grown in small spaces such as the solo cup challenge. The internodes are short and the buds tend to very firmly attached to the central stem, therefore you can cut the lower lateral branches so that the upper branches produce good buds and the central stem has the necessary energy to generate a big bud.

Northern Lights Fast Version Marijuana Plant

The positive thing about Northern Lights Kush Fast Version is that it takes 2 weeks less to flower as it only needs 6 to 8 weeks to be ready for harvest, producing 400 – 550 gr/m2 indoors and about 500 – 600 gr/plant of buds outdoors. Another important quality is that it produces between 15%-19% THC, generating sedative and super relaxing effects in each smoke which leaves earthy and spicy flavors on the palate.

With a catalog of more than 800 strains, it opens up a range of possibilities for growing marijuana. However, when our climate, our weather, or other circumstances prevent us from growing marijuana happily, the best option is to buy fast flowering. Blimburn Seeds offers discreet and fast shipping. Check out our Best Fast Flowering seeds online selection.

Our Fast Flowering strains are unique. They transmit the same essence as their feminized progenitors with an extreme quality of terpenes that ooze trichomes full of top quality terpenes. In addition, buds that you have never seen before in fast flowering strains. Here is a selection of fast flowering strains that you must try.

Chiquitita Banana

This hybrid variety descended from a cross between Banana OG x OG Kush, hence its name C. Banana. These plants have a small size and grow as if they were a bush. They are dense and full of branches and leaves, so if you make a Solo Cup Challenge, you will have to clean the branches in both the lower and middle areas in order to enhance the growth and flowering of the central stem and the upper lateral branches. The production of flowers is 350-400 gr/m2 indoors from buds that are very tight, heavy, and hard as rocks. On the other hand, outdoor growers obtain harvests of 400-600 gr/plant with flowers that are covered in resin, ideal for making extracts.


Another detail that stands out is its rapid flowering of 7-8 weeks that makes it perfect for a single cup challenge. This strain delivers flowers with sweet flavors and citrus notes that have THC levels of 25 %-34%. It produces a euphoric effect at the beginning of the heat and then generates a state of happiness that culminates in a great relaxation. It is definitely a super social variety.

Blackberry Auto

We cannot leave out Blackberry Autofowering strain. This variety is mostly Indica as it descends from a cross of excellence between Cream Caramel Auto x Purple Kush and is ready to be harvested only 70 days after the seed is sown in the ground. Despite its speed and ease of cultivation, Blackberry Auto is powerful, containing THC levels that range from 17% – 19% with buds that generate relaxing effects that can help control insomnia or lower your stress level.

Indoor harvests are great, reaching up to 450 gr/m2 of buds for indoor growers. Outdoor growers can collect between 70-300 gr/plant of delicious flowers that give off berry flavors with notes of kush and blackberry that usually remain both on the palate and in the nose for a long time. We recommend doing LST to open the lateral branches and promote the powerful growth of the buds inside the plant as well as at the tips of its lateral branches. It is not a bad idea to use an extra source of light in indoor crops to promote greater flowering.

Remember, we have more than 140 Autoflowering seeds with the phenotype you want: sativa, indica or hybrid. You can buy these strains on our website with genetic certification and a germination percentage of more than 90%. We offer discreet and fast shipping on all orders.

Get ready for your next solo cup challenge with where we have the best cannabis seeds for sale that you can grow at home. We already gave you the best tips to face this cannabis challenge so your garden will look great with the beautiful rewards of delicious buds with great effects and colors. Now, we say goodbye and will see you on the next blog!

Strains featured in this article:

Mike Wilson

Mike Wilson is a passionate cannabis cultivator with over a decade of experience in the California cannabis industry. Born and raised in the heart of the West Coast, Mike has dedicated his life to honing his skills as a cultivator, becoming a true master of the plant. His love for cannabis and profound knowledge of its cultivation have led him to explore every facet of this captivating plant, from classic strains to the latest trends in cultivation and advanced techniques.

With a unique perspective on cannabis culture and a focus on sustainability and quality, Mike generously shares his valuable tips and tricks on this platform. Through his posts, he will guide you on the exciting journey of cannabis cultivation, providing expert insights and practical experiences to help you achieve success in your own cultivation endeavors. Join Mike on his journey through the world of cannabis and discover how to cultivate responsibly and achieve exceptional harvests. Become part of his community and unlock the secrets of a true cannabis master!

Read More Read Less

Related Articles

Explore our shop

Blimburn OG Seeds