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how to grow purple weed indoors

How to grow purple weed indoors

Trichomes are the tiny glands that cover your buds. Even though they usually start clear, then cloudy, and later on become amber, it is possible to find genetics with purple or even pink trichomes.

In case you’ve never seen a purple cannabis plant before, make sure to check our Purple Punch Auto strain review video below. Now that you have a better idea of what purple weed or a purple weed strain is, you’ll get a better understanding of this article, so read along!


There are a couple of plant species that are known to exhibit different colors based on the substrate’s pH. Even though it’s not confirmed, growers have noticed that different cannabis strains can exhibit slightly different colors on the leaves and buds depending on the pH levels. For example, purple strains tend to turn even more purple if the pH is below 6.0 but most strains will show signs of deficiency when the pH is below 6.0 so it’s not recommended to use this method if you’re a beginner.

Lower temperatures may help the plant turn purple but it may also likely slow plant growth, it’s generally not recommended for growers to lower down the temperature just to achieve colored buds, especially at the beginning of the flowering stage where you may actually be doing more harm than good.

3. Which Parts Of The Cannabis Plant Can Turn Purple?

In most cases, when the substrate’s pH is below 6.0, the purple, red or blue colors get even deeper but it’s most likely that most of the leaves get deficiencies so if you’re a beginner and want to try this, make sure you do it close to harvest so you can harvest your plant if something goes wrong.

How to grow purple weed indoors

For some strains, the leaves may turn purple while the buds stay green.

For many (if not most) strains, low pH can cause brown spots and sometimes yellowing, so use this tactic with caution, and it’s probably only good to try it close to harvest in case your plant becomes riddled with brown spots. T

Auto-Flowering Dark Devil

To produce the most colorful buds, you need to make sure the color goes all the way through the buds, and ideally, also through all the surrounding leaves. This level of color-penetration is most likely to happen with intensely dark colored buds. Buds that are paler in color tend to lose a lot of their vibrancy in the post-harvest processing.

Photoperiod (Regular) Strains

The next two pics are of the strain Frisian Dew, a popular strain by Dutch Passion, who specifically designed the strain for growing outdoors. It is exceptionally hardy, high yielding, and is also mold and pest resistant. About 50% of the time, Frisian Dew buds will turn bright purple instead of green!

There are two parts of the buds that can turn color. One part is the pistils/hairs that stick out. There are several strains where the pistils turn pink or purple.

In some cases, a plant may produce purple tones in response to intense, direct light (on buds and leaves). This is kind of like the plant getting a “tan” and typically is most pronounced on the parts of the plant that are getting direct light (other parts of the plant tend to stay green). The importance of light levels varies on a strain by strain basis.

Choose Deep Purple Buds for Maximum Color After Drying/Curing – Deeply colored buds (sometimes called “black” strains) tend to be the most vibrant after drying/curing.

Most growers want the buds themselves to appear colorful, so the color stays even after the buds are dried and cured.

Many different parts of a cannabis plant can turn purple, including the whole plant!

How to grow purple weed indoors

Many growers believe that depriving weed of oxygen and carbon dioxide is enough to increase the chance of getting purple buds. However, this is NOT true, nor is the practice of boosting nitrogen intake.

Tip #1 for Growing Purple Kush – You Can ‘Turn’ Your Weed Purple

The three most important nutrients are nitrogen (N), phosphorus (P), and potassium (K). Secondary micronutrients include boron, copper, zinc, sulfur, and magnesium. You should purchase and use nitrogen-rich solutions during the vegetative stage and switch to phosphorus-rich solutions during flowering.

Tip #5 for Growing Purple Kush – Nutrients for Hydroponics Systems

Begin pruning when the first shoots have grown through the screen. After a few days, switch the light cycle and force your plants into the flowering stage. Experts say that using the SCROG method in conjunction with proper pruning should provide a gram of weed per watt of light. In other words, a single 400-watt HPS bulb could yield 400 grams (over 16 ounces of cannabis). However, expect Purple Kush’s yield to be significantly lower.