Grandmommy Purple

grandmommy purple seeds

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Grandmommy Purple Seeds – Strain ID:

grandmommy purple seeds

Type: Indica-Dominant Hybrid
Cannabinoids: 30% THC (avg)
Terpenes: Caryophyllene, Pinene, Myrcene
Effects: Calming, Relaxing, Sleep
Landrace Strain: Big Bud x Purple Urkle

Grow Difficulty: Easy
Harvest: 60-65 days
Yield: 500g / m2 / 600g per plant
Height: 100-140 cm (3-4.5 feet)
(*Indoor / *Outdoor)

If you’ve been searching for a high THC producer with a diverse terpene profile and stunning bag appeal, look no further than Grandmommy Purple seeds. This exquisite display of designer cannabis genetics delivers THC levels north of 30% and can be cultivated even if you don’t have significant experience growing marijuana.

Herbies Seeds, a dominant force in the UK’s cannabis industry, curated this incredible strain. The master genealogists at the seed bank created Grandmommy Purple by breeding Big Bud and Purple Urkle, two iconic cultivars.

Grandmommy Purp possesses Indica-dominant genetics, but the experience is relatively balanced. However, at 30% THC, we urge novice smokers to indulge with caution! Despite the name, this isn’t your gran’s homegrown.

About Grandmommy Purple Seeds

History of the Grandmommy Purple Strain

Grandmommy Purple is a new creation from the expert breeders at Herbies Seeds. GMP is a cross between the popular Big Bud and Purple Urkle strains; the result is an exceptionally high total cannabinoid and terpene content producer that offers a relaxing and comforting experience, much like a trip to grandma’s house.

With its potent effects and rich flavor profile, Grandmommy Purple is quickly becoming a favorite among cannabis enthusiasts.

How to Grow Grandmommy Purple Seeds

While Grandmommy Purple is an easy strain to cultivate, we still recommend following our guide so you can enjoy its full potential. The strain’s high compound-producing resin makes it a perfect candidate for flower or cannabis extracts, but you’ll still need to curate an ideal grow environment for the strain to flourish.

Grow Difficulty

Growing Grandmommy Purple cannabis is an easy or moderate cultivar to produce. It is a relatively hardy strain, making it adaptable to climate changes and infestations, but it requires specific growing conditions to thrive.


One of the critical factors to consider is the lighting. Grandmommy Purple plants need adequate light to deliver highly productive flower. The most popular lights for growing indica cannabis strains like GMP are typically high-intensity discharge (HID) lamps, such as metal halide (MH) and high-pressure sodium (HPS) lamps. These lights provide a balance of light spectrum ideal for promoting vegetative growth and flowering in cannabis plants.

LED lights are also suitable for growing indica cannabis strains, as they can be adjusted to provide the specific spectrum of light needed for the plant’s growth stage.


During the vegetative stage, your Grandmommy Purple plants will require a higher ratio of Nitrogen (N) for healthy foliage growth. We suggest an NPK ratio of 3-1-1. As the plants start to flower, the ratio should shift to a lower Nitrogen and higher Phosphorus (P) and Potassium (K) ratio of 1-3-2 to promote healthy bud development.

Training and Pruning

Proper training and pruning techniques such as topping, FIMing, or LST (low-stress training) are essential for heavy producers like Grandmommy Purple. We also recommend lightly trimming larger fan leaves to increase the total weight of your yield.

Optimal Growing Conditions and Climate

Grandmommy Purple plants prefer a moderate climate, with temperatures between 70-85°F and humidity between 40-50%. While Grandmommy Purple feminized seeds are resilient to change, your harvest will be affected if the temperature or humidity levels are too high or too low for extended periods.

Watering Grandmommy Purple Seeds

Watering is an essential aspect of growing Grandmommy Purple cannabis seeds. Proper watering can ensure that the plants are healthy and produce high-quality buds.

When watering outdoor Grandmommy Purple plants, it’s important to keep the soil evenly moist but not waterlogged. Over-watering can lead to issues such as root rot, while under-watering can cause the plants to become stunted and produce lower yields. A good rule of thumb is to allow the top inch of soil to dry out before watering again.

It’s also important to keep an eye on the drainage of the soil or growing medium. Ensure that the excess water can drain away quickly to prevent water from pooling around the roots of the plants. Using a well-draining soil or soil-less mix can help to avoid water-logging.

Flowering Time

Grandmommy Purple flowering time is typically around 60-65 days, depending on your specific growing conditions.

During the flowering stage, your buds will mature quickly. Grandmommy Purple cannabis has a fast-flowering period, so it is vital to monitor the trichomes, which will change color from clear to milky white when the buds are ready for harvest.
In addition, the quick-to-mature nature of the strain makes ventilation extremely important. We recommend implementing a carbon filter if you are cultivating indoors to limit the pungent aroma exuding from your grow.


Under optimal growing conditions, Grandmommy Purple plants can produce moderate to high yields. Growing indoors, you can expect around 500g/m2. Outdoor Grandmommy Purple seeds will deliver more flower at about 600g per plant.


The height of Grandmommy Purple cannabis plants can vary depending on the growing conditions and techniques used. However, these plants typically reach a height of 140cm when grown outdoors and around 100cm when grown indoors, which is typical for Indica-leaning cannabis strains.

While the stalks will become quite thick in preparation for the impressive yield of heavy buds, you may want to reinforce their branches for additional support.

Resistance to Pests and Diseases

Grandmommy Purple cannabis plants are resilient due to their robust genetic profile. However, we still recommend growing in a clean and controlled environment with proper air circulation. Follow these tips to prevent pests from affecting your yields when it comes time to harvest.

Spider mites are one of the most common pests affecting cannabis plants. An infestation will cause damage to the foliage and buds. To prevent spider mites, it’s essential to maintain a clean and hygienic growing environment and to monitor the plants regularly for any signs of tiny whitish pinpricks on the surfaces of your leaves. Neem oil, insecticidal soap, and other organic solutions can be used to control spider mites.

Another common pest that can affect a poorly managed grow environment is whiteflies. These bugs cause the yellowing of leaves and stunted growth; you’ll notice yellow or translucent marks on leaf surfaces, honeydew, or ants attracted to the whitefly waste. To prevent whiteflies, it’s crucial to maintain a clean and hygienic growing environment and to monitor the plants regularly for any signs of infestation. Insecticidal soap, neem oil, and other organic solutions can be used to control whiteflies.

Grandmommy Purple Strain Description and Properties

Grandmommy Purple Appearance

The buds of Grandmommy Purple plants have a dense, multi-colored appearance, from bright, electric greens to deep dark purple. Each nug is coated with a thick layer of trichomes, giving them a sticky and resinous texture.


The aroma of Grandmommy Purple is one of its standout features, with a complex blend of sweet and earthy notes, with hints of berry and grape. The scent is sweet and fruity, with a touch of smoky skunkiness. It’s a distinct aroma that is hard to mistake for any other strain.

You’ll be overcome with the unique fragrance when the buds are broken up or ground. The aroma is intense and can be pretty strong, so it’s not recommended to grow or store large amounts of this strain if discretion is a concern.


The flavor of Grandmommy Purple compliments its aroma, with a sweet and earthy taste that is both smooth and satisfying. The flavor combines fruit and earthy undertones with a hint of skunkiness. As a result, GMP’s bite is far more invigorating than other purple phenotypes known for their potent skunky, kushy flavor.

When smoked or vaporized, the flavor is relatively smooth and easy on the palate. The sweet and fruity notes are prominent and well-balanced with the earthy undertones. The skunk notes are not overpowering and add a unique layer of complexity to the taste.

Cannabinoid Content

Grandmommy Purple strain is known for its high THC content, reaching up to 33%. This makes it a strong and potent cultivar, not recommended for novice or low-tolerance consumers.

In addition to high levels of THC, Grandmommy Purple also has an impressive total cannabinoid content, with other cannabinoids such as CBD, CBN, and CBC present in its resin glands. These cannabinoids can work together with THC to produce various effects, including pain relief, anti-inflammatory effects, and sedation.

It’s important to note that the exact levels of THC, CBD, CBN, and CBC can vary depending on your growing conditions. Follow best practices and our recommendations for all your Grandmommy Purple plants to reach their maximum potential.

Dominant Terpenes in Grandmommy Purple Cannabis

The terpenes present in Grandmommy Purple result from genetic traits passed down from Big Bud and Purple Urkle. Both have high concentrations of Caryophyllene and Myrcene, with Big Bud significantly adding Pinene. As a result, the terpene profile features some of the most effective and sought-after aromatic oils for recreational and medical cannabis users.

Grandmommy Purple Strain Effects

The Grandmommy Purple strain’s high can be described overwhelmingly as full-body and calming. It’s an excellent strain for those seeking stress, anxiety, and pain relief. While this strain can be used at night and will rock you to sleep with no problem, the sedative effects aren’t overwhelming when smoked during the day. The balanced high makes it a perfect option for relaxation.

High THC content means this strain is not recommended for novice or low-tolerance consumers.

Grandmommy Purple’s Medical Potential

One of the most common uses for Grandmommy Purple is for pain relief. The high THC content can provide strong pain-relieving effects, making it a terrific option for those with chronic pain conditions. In addition, the other cannabinoids present can also work together with THC (a phenomenon known as the ‘entourage effect’) to provide anti-inflammatory effects, which can further reduce pain and discomfort.

The strain is also known for its relaxing and soothing effects. The high THC content can produce a strong body high and will put you down when taken in large doses. This can be beneficial for those with insomnia or other sleep disorders and those looking for relief from stress, anxiety, and depression.

Adverse Effects of Grandmommy Purple Weed

Due to its high THC content, Grandmommy Purple can also cause some cognitive side effects, such as paranoia, short-term memory loss, and confusion, especially for novice or low-tolerance consumers. Therefore, always start with a low dose and be comfortable and safe when consuming heavy hitters like Grandmommy Purp.

The sedative effects of this strain can also lead to drowsiness and couch-lock, which can be beneficial for some users, but for others, it may not be suitable for tasks that require alertness and focus. So again, take it slow and enjoy the euphoria of the strain; you don’t need much to experience its psychoactive properties.

Pros/Cons of Growing Grandmommy Purple Seeds


  • High THC potency
  • Diverse terpene profile
  • Resistant to pests and mold
  • Easy to grow
  • Balanced indica effects


  • Branches need support
  • Need to ventilate pungent odor

Buy Grandmommy Purple Seeds:

Herbies Grandmommy Purple Seeds

Shipping worldwide

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