Runtz Muffin Seeds

A comprehensive guide to transforming Runtz Muffin seeds into delicious flower!

runtz muffin seeds

High THC content. Easy to grow. Scrumptious flavor profile. What more could you want in a strain?!

Runtz Muffin seeds are a cultivator’s dream due to the strain’s resilient genetics and near 30% THC potency. Whether you are just beginning your journey growing premium weed or are a seasoned veteran, Runtz Muffin is one of the most attractive options to include in your next harvest.

A brilliant combination of two of the industry’s most iconic cannabis families, Zkittles and Gelato #3, delivers a delectable, high-potency, indica-dominant powerhouse. The buttery aroma, stunning physical appearance, and extremely high yields have made the cultivar a staple in dispensaries around the world.

In our Runtz Muffin strain review, we’ll provide all the information you need to grow a mouth-watering tray of fluffy, premium flower. In addition, we’ll offer average flowering times, a detailed feeding plan, and an analysis of the strain’s psychoactive and medicinal effects.

Runtz Muffin Seeds – Strain ID:

runtz muffin seeds

Type: Indica-Dominant Hybrid
Cannabinoids: 28% THC (avg), <1% CBD
Terpenes: Caryophyllene, Limonene, Linalool
Effects: Euphoria, Relaxation, Giggly
Landrace Strain: Zkittlez x Gelato #3

Grow Difficulty: Easy
Harvest: 56-63 days
Yield: 600 g/m2 / 1kg per plant
Height: 200 cm and above
(*Indoor / *Outdoor)

The Best Runtz Muffin Feminized Seeds in 2023:

Runtz Muffin Seeds Herbies

• 29% THC
• Harvest: 56-63 days
• Yield: 600g/㎡

• Free, Discreet, Worldwide Shipping
• Germination Guarantee
• Free Seeds with Every Order

• 3 Seeds – $43.26
• 5 Seeds – $43.26
• 10 Seeds – $128.68

About Runtz Muffin Seeds


Runtz Muffin is one of the most coveted strains in the modern cannabis industry. The master genealogists from Barney’s Farm in Amsterdam baked up a savory masterpiece through genius selective breeding. Runtz Muffin was born by combining the genetics of Zkittles and Gelato #3 to achieve a gourmet flavor and adding Orange Punch to increase yields and cannabinoid production.

Today the phenotype is enjoyed by countless cannabis connoisseurs, from the coffee shops in its homeland to dispensaries on the West Coast. The strain’s popularity has grown exponentially as the Runtz family is one of the most consumed varieties in the US and Canada.

How to Grow Runtz Muffin Seeds

While many high THC-producing strains require the care of a master cultivator, Runtz Muffin is straightforward to grow and the perfect choice for beginner growers. That being said, you still want to follow best practices regarding feeding, watering, airflow, and pruning.

Follow our guide, and you’ll learn everything you need to know about growing a delicious batch of Runtz Muffins.

Grow Difficulty

No need to sweat the minor details when growing this resilient cultivar; as long as you curate a stable grow environment and execute cultivation basics, you’ll be on your way to harvesting gorgeous flower with unmatched bag appeal.

Optimal Growing Conditions and Climate

The optimal growing conditions for Runtz Muffin consist of a warm and humid climate, with temperatures between 70-80 degrees Fahrenheit and a humidity level of around 40-50%. Runtz Muffin can be grown indoors and outdoors, but it is crucial to provide the plants with plenty of light and nutrients to promote healthy growth.

When grown outdoors, this strain typically flourishes in the late summer and early fall, while indoor grows may have a longer harvest window. As with all cannabis plants, monitor the pH levels of the soil or water to ensure that the plants can absorb the necessary nutrients for optimal cannabinoid production and yield.

Flowering Time

The flowering time for Runtz Muffin cannabis strain is typically between 8-9 weeks. After the plants have been in the vegetative stage for a minimum of 4 weeks, they should be switched to a flowering schedule with a 12/12 light cycle.

The plants will begin to produce large, dark buds during the flowering or blooming stage. As time progresses, the flower will start to swell, become denser, and develop a thick coat of resin. Once your plants are near the end of the flowering stage, the trichomes will begin to turn amber, indicating that the buds are ready for harvest.

Add Color to Runtz Muffin Cannabis Plants

Due to the cultivar’s exquisite genetic profile, it can produce an incredible array of colors in the right conditions. The Runtz family is known for deep dark hues. You can bring these intense shades of green, purple, and crimson out by dropping the temperature in your grow late in the flowering stage.

How to Feed Runtz Muffin Cannabis Plants

To achieve maximum yields, proper nutrition is critical when growing Runtz Muffin cannabis plants. The key elements that high cannabinoid-producing marijuana plants require are Nitrogen (N), Phosphorus (P), and Potassium (K) which are commonly referred to as NPK.

Feeding in Veg

During the vegetative stage, your plants will require more Nitrogen (N) to build foundational growth components like proteins, enzymes, and chlorophyll. A good NPK ratio during veg is 2-3-1 (N-P-K). During this stage, plants are hungry for a regular supply of Nitrogen-rich fertilizers to support the healthy growth of leaves and stems.

Feeding in the Flowering Stage

As the plants enter the flowering stage, the ratio should shift towards a higher amount of Phosphorus (P) and Potassium (K) to support the development of buds and flowers. A good NPK ratio for this stage would be 1-3-2 (N-P-K). Fertilizers high in Phosphorus and Potassium will help build a robust root system and produce ATP, an essential component of regulating the rate of photosynthesis.

NPK ratios are not set in stone and can vary depending on the growth medium and other factors. Be cautious of over-fertilization as it can harm your plants; too much of any nutrient will create what is known as nutrient burn. Therefore, starting with lower doses and increasing as needed is recommended.

Organic Nutrient Options

If you want to keep your grow all-natural, you can also use organic fertilizers like worm castings or bat guano, which are rich in Nitrogen, Phosphorus and Potassium. They also provide other micronutrients that are important for cannabis growth.


The cannabis strain Runtz Muffin is known for its massive indoor and outdoor yields. When grown indoors, it is capable of producing up to 600 grams per square meter, while outdoor grows can yield up to a kilogram per plant.

To achieve these high yields, it is essential to give the plants a minimum of 4 weeks in the vegetative stage, followed by 8-9 weeks of flowering. This strain is a heavy feeder, so providing it with ample nutrients and light is critical to achieving maximum yields. We also recommend proper pruning and training techniques to encourage airflow and limit mold.


Runtz Muffin cannabis plants can grow to above-average heights, reaching over 6 feet when grown outdoors. While this is a genetic blessing for outdoor cultivators, indoor growers should be mindful of the size of these plants and ensure they have enough space to allow them to stretch out.

The tall stature of Runtz Muffin plants can make it challenging to maintain adequate air circulation, which is crucial for preventing mold and mildew. Space out your plants and ensure that your grow room or tent has a sufficient exhaust system to remove hot air and humidity.

Additionally, proper pruning and training techniques can help to control the height of Runtz Muffin plants and increase yields by directing energy into bud growth rather than vegetative growth.

Resistance to Pests and Diseases

Runtz Muffin is a highly resilient strain and will naturally fend off pests, mold, mildew, and disease. However, we suggest implementing a plan to protect your plants from external threats.

Ensure your grow is getting proper airflow; this will reduce the likelihood of mold and mildew. Also, utilize pesticides to prevent infestations. Neem oil is a great natural alternative if you are growing organic.

Strain Description and Properties

Runtz Muffin’s Bag Appeal

Highly optimized cannabis strains like Runtz Muffin often deliver stunning appearance, flavor, and aroma; however, this variety is truly in a league of its own.

Runtz Muffin can produce an array of incredibly complex colors that will drive customer interest the second they lay eyes on the buds. The strain is naturally a dark hue of green, but purples and even crimson colors will reveal themselves during the late flowering stage.

The dried flower has pockets of different shades encapsulated by resin-soaked leaves, carrying on the inspiration for the Runtz family’s branding. A sweet and savory burst of buttery flavor is packed into every hit, making the cultivar a unique experience that will immediately remind you of a delicious baked dessert. The smoke has a creamy lavender scent followed by an undeniable sweet, fruity aroma of freshly baked sugar cookies.

Runtz Muffin’s bag appeal is rivaled by a few strains on the market, with a small percentage coming delivering the cannabinoid production of the coveted cultivar.

Cannabinoid Content

One of Runtz Muffin’s most marketable attributes is its high THC content. Even inexperienced growers can easily hit potency levels of around 30%.

This strain is a heavy hitter, so if you aren’t accustomed to consuming significant doses of THC, we suggest proceeding with caution to avoid any adverse effects.

Dominant Terpenes in Runtz Muffin Cannabis

Like all premium stains, terpenes are the driving force behind what makes Runtz Muffin so unique. Aromatic oils like Caryophyllene, Limonene, and Linalool are passed on by selective breeding to bring forward the sweet, fruity, buttery flavors.

High terpene content also makes Runtz Muffin a premium candidate for cannabis extracts due to its unique flavor profile. The cannabis consumer has shifted to appreciating the array of compounds produced by the flower’s resin glands.

Runtz Muffin Strain Effects

While Runtz Muffin is a 70% indica-dominant phenotype, the effects are surprisingly balanced. After enjoying the strain, you’ll still experience a deep, soothing sense of relaxation but won’t feel overly tired, unmotivated, or sleepy. As a result, this strain is suitable for any time you want to let go of your stress and escape the everyday worries of life. In addition, Runtz Muffin is known to deliver a strong sense of euphoria that will keep you smiling for hours.

Runtz Muffin’s Medical Potential

Runtz Muffin cannabis strain is known for its high THC content, which can make it an effective treatment for a variety of medical conditions. The most common uses include pain relief, stress and anxiety reduction, and as an appetite stimulant. In addition, strains with high THC potency levels can also help to alleviate chronic pain, headaches, and muscle spasms.

The appetite-stimulating properties of Runtz Muffin may also be beneficial for patients who have difficulty maintaining a healthy appetite due to serious health complications or those undergoing treatment.

Cannabis can have different effects on different people, so it’s always wise to consult a medical professional before using cannabis to treat a medical condition.

Adverse Effects of Runtz Muffin Weed

Like with any potent cannabis strain, Runtz Muffin can have some adverse effects if consumed in large amounts or by specific individuals. The most common adverse effects include feelings of dizziness, paranoia, or anxiety, especially if they consume more than their tolerance level. However, these effects are usually temporary and can be alleviated by reducing the amount consumed or waiting for them to pass.

Some individuals may be sensitive to the psychoactive effects of high-THC strains and should start with a low dose and gradually increase it as needed. Long-term or excessive use can lead to various adverse effects, so consume safely and in moderation.

Pros/Cons of Growing Runtz Muffin Seeds


  • High THC content
  • Unique blend of terpenes
  • Easy to grow
  • High yields
  • Balanced effects
  • Exquisite flavor, aroma, appearance


  • Requires plenty of space
  • Regular pruning is necessary
Watch: Runtz Muffin Indoor Grow

The Best Runtz Muffin Feminized Seeds in 2023:

Runtz Muffin Seeds Herbies

• 29% THC
• Harvest: 56-63 days
• Yield: 600g/㎡

• Free, Discreet, Worldwide Shipping
• Germination Guarantee
• Free Seeds with Every Order

• 3 Seeds – $43.26
• 5 Seeds – $43.26
• 10 Seeds – $128.68

Main Category Page:
Cannabis Seed Index – A curated index of the world’s best cannabis seed strains. Each review contains vital information, such as cultivation tips, strain profiles, and where to buy the best cannabis seeds.
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