Are either of these good to use during flower?

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I went ahead and ordered the Monster Bloom one.

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Bloom boosters should be avoided. They aren’t necessary when using a good fertilizer product and they can cause problems with pH and your NPK ratio.

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Most multi part nutrient lines can be adjusted to increase and/or decrease NPK ratios. For instance, using Jack Peters 321 system, Part B (CalNit) can be increased for more nitrogen in veg and early flower, whereas Part A can be increased during mid flower for higher P and K levels.

Bloom boosters should be used cautiously and sparingly.

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Welcome i agree with fellow growers, bloom boosters is money not necessary to spend when using a good cannabis, friendly feed product.

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Once you find a good balanced nute program, that’s all you need. Keep it simple. Boosters are made more to catch growers not help plants. Jacks is a complete nutrition feed that you can simply vary the ratio of parts to tailor feeds to your plants. You can run it normally in veg at 3-2-1 or use it at 4-2-1 for flower. Infinite combos with it, but it works great like it was designed to.

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I put bloom boosters in a category even worse than burple lighting products. They are not just ineffective. They are harmful in many cases, particularly for new growers who don’t understand the implications of the product. Experienced growers don’t use bloom boosters.

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Switch to Jacks 321 from beginning to end.

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