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After a couple of weeks, your plants should enter the vegetative stage. Typically, White Widow remains in the vegetative stage for up to eight weeks. During this time, we recommend exposing it to a minimum of 18 hours of light a day.

Once the plants outgrow their original containers, switch them to larger pots. By doing so, you ensure they develop a robust root system along with a thicker stem. Ideally, you will make sure the light focuses low on the plant, but avoid burning the tips! Once you have reached the eight-week mark, or feel that your plant is ready, switch to a 12-hour light cycle. You must expose your crop to 12 hours of continuous darkness each day to force it into flowering. It is at this stage that you can implement the SCROG method. It is imperative that you evenly distribute the light. White Widow’s flowering time lasts 7-9 weeks when grown indoors.

If you are an outdoor grower, it is ready for harvest by the end of October. Use the Pistil Method to check whether it is harvesting time. Make sure that at least 70% of the pistils have turned amber before harvesting. Most experts classify White Widow’s yield as moderate to low. If you grow indoors, you could yield up to 18 ounces per square meter. Outdoor growers regularly benefit from a slightly larger yield at 21 ounces per square meter. Other growers suggest that you will receive up to 180 grams of weed (just over six ounces) per plant when you grow indoors. You need to know that White Widow is one of the hardest marijuana strains to grow, especially outdoors. Generally speaking, most marijuana strains thrive in temperatures of 70-80 degrees Fahrenheit. However, White Widow is capable of absorbing more light at even higher temperatures. We’ve heard reports of growers exposing their plants to temperatures of up to 90 degrees. Make sure the temperature stays above 70 degrees during the day and above 60 degrees at night. Your White Widow plants are mildly shocked at 55 degrees. They could die if repeatedly exposed to temperatures below 50 degrees. As for humidity, keep it at 70% during germination and drop into the mid to upper-60’s during the vegetative stage. Once it reaches the flowering stage, reduce it by up to 5% weekly until it is in the 30-40% range. You can go as high as 95 degrees if you include carbon dioxide enrichment of 1500 ppm. You must also vent regularly to ensure humidity remains at a lower level. White Widow evolved in an era where natural carbon dioxide levels were several times higher than they are today. When you boost the CO2 concentration, you significantly increase the plant’s ability to manufacture the sugars it needs to grow. All growers know that nitrogen (N), phosphorus (P), and potassium (K) are the mainstays of the garden. When purchasing plant food, you’ll probably notice three numbers on the front. These represent the N-P-K content of the food in percentage form. For example, a 20-15-15 formula consists of 20% N, 15% P, and 15% K. Make sure your plant receives more Nitrogen in the vegetative stage but reduce it in flowering.

At that stage, plants need more Phosphorus and Potassium to help boost their THC content. Other essential nutrients include Sulfur, Magnesium, and Calcium. You must also add trace amounts of Manganese, Zinc, Copper, Boron, Iron, and Molybdenum. If you usually water your plants once a week, for example, you can decrease it to every 3-5 days if your soil has good drainage. A good tip is to add perlite or lava rock to the medium, as this helps with drainage. Finally, please make sure that you stop feeding nutrients to your White Widow plants around two weeks before harvesting. Otherwise, your precious strain will taste like plant food! For the record, White Widow performs well at a slightly higher pH than other strains. While most strains do best at a pH of 6.0, you can bump it as high as 6.5. If you are using a hydroponics setup, lower the pH by 0.5 or so.

It helps you check if your plants’ soil is becoming too acidic or alkaline. Pests are an issue with White Widow, whether you grow it indoors or outdoors. Aphids, mites, fungi, caterpillars, and whiteflies are the worst offenders. They are capable of causing significant damage to your crop. If you bring in White Widow plants from outside, make sure you use pyrethrum on every leaf before storing them in your growing room.

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