The Indica legacy of Granddaddy Purple makes it a hardy and resilient plant. With minimal precautions, it can flourish either indoors or outdoors. The most crucial factor is the relative humidity (RH) which can affect its ability to absorb water and nutrients. Other than that, it is highly resistant to pests and diseases. With this strain, novice growers can keep things simple, whereas experts find it highly adaptable to modifications such as super cropping.
GDP is exceptionally suited to indoor growing. The plant is short and stout, making it easy to control in a low-ceilinged room. You can grow it in soil or a hydroponics setup; the maximum height of 3 feet allows it to be flexible. Just remember to keep an eye on the humidity level. 50% RH is optimal because higher than that might encourage bud rot or powdery mildew to proliferate. Moreover, a wet environment will cause the stomata on the leaves to close, hindering nutrient absorption and stunting growth. To monitor the RH, invest in a digital hygrometer. Also, only water your plants when the lights are on so that the excess moisture can evaporate.
If you decide to grow outdoors, make sure that the conditions are dry and sunny. But having said that, GDP is able to handle slightly cooler temperatures for short periods. In fact, the cold can stimulate the anthocyanins to manifest themselves. These are the pigments that give the leaves and buds their blue-violet color. Besides affecting the plant’s appearance, studies show that they also have the potential to treat cardiovascular disease and cancer.
In the open air, Granddaddy Purple can grow up to 6 feet tall. You have to wait until October for the flowering stage. Before the frost sets in, you should be able to harvest 16 to 20 ounces of bud per plant (450 to 550 grams). The yield indoors is almost the same, up to 18 ounces for a 3-square foot area (500 grams per square meter). Given that it is much easier to control the humidity in a grow room, especially during the 9-week flowering period, we recommend indoor cultivation.
The impressive yield of our GDP seeds is due to the fact that they are feminized. This means that they are guaranteed to produce only female plants. As this 2017 report explains, male plants are unnecessary because they do not produce buds. Additionally, they can even damage your crop. The pollen from males will contaminate the females’ flowers and wreak havoc. By eliminating the male sex chromosomes from these seeds, we have taken care of this problem for you. Furthermore, feminized seeds also have a higher THC content. In the case of this strain, it is a formidable 23%.
As harvest time approaches, you will be overjoyed to see humongous, deep purple buds. They will be covered with dense white trichomes. It is these sticky trichomes that give the weed potency. To find out if they are ready to harvest, wait for the pistils – the tiny hairs scattered throughout the plant – to turn orange. That signals the peak of cannabinoid production.
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