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#5 in Fertilizers
Jacks Classic 20-20-20 All Purpose Fertilizer
Jack's
$18.00 – $24.00
Professional-grade water-soluble fertilizer used by commercial greenhouses with a balanced 20-20-20 NPK ratio. Dissolves completely in water without residue and feeds through both roots and foliage.
8.5
Excellent
Consensus
Don't buy this if…
- The concentrated formula must be precisely measured; a kitchen scale is recommended over volume measurements.
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