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Hydro Bloom contains a higher concentration of phosphorus and potassium components compared to the Hydro Growth. Plants have an increased need for phosphorus as well as potassium in the flowering phase in order to create strong and healthy flowers. During the first half of the bloom this need is fully satisfied by Hesi Hydro Bloom. In the second half of the flowering phase, Hesi PK 13/14 is added in combination with Hydro Bloom in order to fulfil the needs entirely.
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