Nutrients during blooming

First: your plant have hermaphroditism: you should have removed male flower as soon as you spot then. Some male flowers are open, which means that pollen has spread to the growing area and the plant has self-pollinated (you risk having seeds in the buds). Your dosages are strange: normally, you should add 4mL/L of bases nutrients (Micro, Grow & Bloom) and 2mL/L of each additives needed at times, not 3mL/L for everything. Right now, you should switch from Big Bud to Overdrive as you flowers are starting to fatten. Also, you shouldn't need any PH down your solution, since the bases are "PH Perfect" and are supposed to stabilise themselves. I think your plant will be ready in 3~4 weeks from the look of it, but you cut when you're happy with the ratio of transparent/milky/amber trichomes you like (and you anticipate a few days to stop fattening). The breeder's instructions should also enable you to anticipate the harvest period.

Determining when to stop adding nutrients and how long your plant will continue to bloom can depend on several factors, including the specific strain of cannabis you are growing, environmental conditions, and the plant's overall health. However, there are some general guidelines you can follow. Flowering Time for the Strain: Different cannabis strains have varying flowering times. Some may finish flowering in 8 weeks, while others may take 12 weeks or longer. Check the breeder's or seed bank's information on the specific strain you are growing to get an idea of the expected flowering time. Trichome Development: One common method to determine when to harvest is to monitor trichome development. Trichomes are the resin glands on the buds, and their appearance can provide insights into the plant's maturity. Use a magnifying tool to inspect the trichomes. When they are mostly cloudy with a hint of amber, it's usually a good time to harvest. This is a more reliable indicator than just relying on the number of weeks. Nutrient Flushing: As you approach the end of the flowering stage, it's common practice to flush the plant with plain, pH-balanced water. This helps remove any residual nutrients from the plant tissues, improving the taste and quality of the final product. Many growers start flushing about two weeks before harvest, but this can vary. Observing Plant Health: If your plant starts showing signs of nutrient deficiencies or excesses, it may be an indication to adjust your nutrient regimen. If the plant appears healthy and is nearing the expected flowering time, it's a good sign that it may be close to harvest. Follow the Nutrient Manufacturer's Recommendations: Check the nutrient manufacturer's guidelines for the specific products you are using. They often provide information on when to stop using certain supplements or when to adjust nutrient concentrations during different stages of growth. In your case, the Advanced Nutrients lineup includes products designed for the flowering stage. As you approach the end of the flowering period, you might consider tapering down the nutrient concentrations, especially if you notice that the plant is close to harvest and trichomes are maturing. Remember that these are general guidelines, and the best time to harvest ultimately depends on the specific conditions of your grow and the characteristics of the strain you're cultivating. Regular monitoring and observation of your plant's development will provide the most accurate information.

Your supposed to use nutrients until the plant is done then you stop and do a flush so the rest of nutrients are used up after that the plant is ready to harvest.