Grandaddy Purple (GDP)

Rambo May 11, 2012 5
Grandaddy Purple (GDP)
  • Looks
  • Smell
  • Taste
  • Potency
  • Effectiveness

Grandaddy Purple also know as GDP was developed in northern California around the year 2000. GDP’s lineage includes; Mendo Purps, an unnamed Afghani, and Skunk #1. The GDP family includes several variants that are likely different phenotypes of this union. As siblings, or perhaps cousins; GDP, Grape Ape, and Purple Erkel have much in common but also exhibit unique distinctions. We had an opportunity to speak with Bret Bogue, owner of Apothecary Seeds. He informed us that his Grape Ape phenotypes are the origin of this purple phenomenon. Bret went on to explain that the name, Grandaddy Purple, was coined by Ken Estes to describe a specific pheno found throughout Brets seed lot. We asked Bret for a quote and he gave us this;

“The Grape Ape is a strain that has many medical uses. Besides its notoriety and desirable taste, the Grape Ape can be very helpful for pain…. and internal pain.”

We attempted to contact Ken Estes to hear his side of the GDP story, but have been unable to reach him. It appears he has declined our interview.


Type: Indica
Lineage:  Mendo Purps, Unnamed Afghani, and Skunk #1
Breeder: Apothecary Genetics (Grape Ape)
Seed/Clone: Seed (see below), most often distributed as clone
Seed Available: Grape Ape variant available through Apothecary Genetics, possibly available seasonally from Ken Estes at


Considering GDP is known for it beautiful purple hues, our reviewers didn’t score the looks as highly as we would have expected. Here are some interesting observations from Jackwagon (liver disease) who describes his sample as, “dense mostly green in color with a hint of purple splashed with some orange hairs. very nice…” The observation from our other reviewers remained consistent with Jackwagons, yet none were nearly as enthusiastic.


The bouquet was often described as piney, as mentioned by Mindhead (pain/insomnia), “Very nice and slightly piney smell. Strong odor was not pungent but was wonderful.” Mitchy who treats her pain from fibroid tumors found the odor to be quite complex and describes it as, “…an unusual blend of sweet, fruity and musty or earthy. Pleasant but unusual.”


We received many conflicting descriptions of GDP’s taste, but most of our reviewers agreed that Grandaddy Purple is smooth smoking and great tasting. Olga who suffers from pain associated with a knee injury described the flavor as, “Very light, sweet flavor. Finished with a slightly caramel taste”. Jess-has-MS was not overly impressed stating, “This flavor was kind of smokey, perhaps what others call “skunky” (this wasn’t from the buds smoking, as I use a vaporizer). Otherwise, the flavor was mild, nothing unusual…”.


Grandaddy Purple is often described as having a long lasting, mellow high. Some reviews suggested this strain made sleeping easier and lasted throughout the night. Our favorite description was from Greenthumb (PTSD) who said, “I feel good and it’s hard to keep a smile from crawling across my face. I don’t feel very inebriated though. The effects are there but it isn’t overpowering”. GDP seems to induce a lasting high that for many reviewers lasted between 3 and 4 hours.


Almost all of our testers found relief from their unique symptoms after medicating with Grandaddy Purple. Many reviewers found the strain to be a powerful appetite stimulant. Jess-has-MS (multiple sclerosis) found GDP quite effective in treatment of her neuropathic pain, but in contradiction to many other reviewers, would not recommend it for insomnia.

The reported side effects from GDP were nominal. Cancer Survivor mentioned feeling antsy while Jill (ADHD) felt lethargic and sleepy. Mitchy said she experienced “…full on munchies, eating every snack in sight till I crashed…” and Shortcakes (Lupus/Fibromyalgia) experienced mild anxiety.

Everyone with the exception of Olga (knee injuries) said they would recommend GDP to others who shared their unique medical conditions. These were her exact words, “Not for intense pain, recommended for patients with anxiety or hunger issues”.

View all 14 reviews for Grandaddy PurpleReviewers Biographies
THCA 16.25%
THC 0.3%
CBN 0.02%
CBDA 1.56%
CBD 0%

Total THC 16.5%
Total CBD 1.6%
Total CBN 0%
Total Active Cannabinoids 18.1%
Moisture Content: 8.31%

Interested in learning a bit more about what these lab results mean? This article on Understanding Cannabinoids is a good place to get started.

Typical Growing Traits:

Indoor/Outdoor: both
Maturation: 7-8 weeks indoors , late September-October outdoors
Height at Finish: 3-8 feet
Yield: Indoor; up to 500  grams per 1000 watts. Outdoor; 2 pounds or more per plant.
Predisposition for pest and fungus: Exhibits weakness to Powdery Mildew and Botrytis
Notes: One marker that may denote GDP from her cousins is an elongated petiole, often extending to near cartoonish proportion. GDP has a very strong tendency to become quite purple.

Strain As Tested:

Indoor/outdoor:  Indoor]

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Rating: 3.5/5 (2 votes cast)

Grandaddy Purple (GDP), 3.5 out of 5 based on 2 ratings



  1. gore August 28, 2012 at 6:49 am -

    This strain was used by a friend of mine to treat her cluster seizures. In her case, a single joint was made to last for over a week. She smoked a small amount before bed and reported that the GDP stopped her seizures and and assisted with sleep.

  2. Chanelle November 8, 2013 at 5:42 am -

    Where can i get seeds ? Of the gdp ?

    • Rambo November 19, 2013 at 5:32 pm -

      Grape Ape variant available through Apothecary Genetics, possibly available seasonally from Ken Estes at

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