Jack's Professional 20-3-19 Petunia FeED Fertilizer | 25lb (80/PL)

Low-Phosphorus Iron-Chelate Formula for Petunia and Calibrachoa, 20-3-19

Petunia and calibrachoa stretch fast under a standard bedding-plant feed and need extra iron to avoid deficiency symptoms. Jack's Professional 20-3-19 Petunia FeED uses a proprietary triple-source iron chelate blend and a low phosphorus level built specifically to help prevent excessive elongation.

25lb (80/PL), acidic 420 lbs. CCE, no urea.

Key Features & Benefits

• Triple-source iron chelate blend — increases iron availability over a broad pH range, double the iron of typical peat-like formulations.
• Low phosphorus level — helps prevent excessive stem elongation in petunia, calibrachoa, and bacopa.
• Additional magnesium — supports optimum crop performance alongside the core N-P-K.
• High nitrate nitrogen, no urea — moderately high potential acidity, 420 lbs. CCE.

Who Should Use This Petunia FeED Formula

This fits commercial greenhouse growers producing petunia, calibrachoa, or bacopa who need a professional-grade formula built around those crops' iron needs and elongation tendencies.

About Jack's Professional Iron-Chelate Technology

Jack's Professional formulas like this Petunia FeED use proprietary multi-source iron chelate blends to keep iron available across a broad pH range, delivering more consistent iron uptake than a single-chelate source.

Frequently Asked Questions

What crops is this formula built for?

It's formulated for use on petunia, calibrachoa, and bacopa specifically, with a low phosphorus level built in to help prevent the excessive stem elongation those crops are prone to under a higher-phosphorus feed. That's a different focus from a general bedding-plant formula.

Why does this formula use a triple iron chelate blend?

The proprietary blend of iron chelates from 3 sources increases iron availability over a broad range of pH, delivering double the iron found in typical peat-like formulations. That matters because petunia and calibrachoa are known to be sensitive to iron deficiency under certain pH conditions.

How is this different from Jack's Classic Petunia FeED 20-6-22?

This is Jack's Professional 20-3-19, a different N-P-K ratio and product line from the Jack's Classic Petunia FeED 20-6-22 retail formula, even though both target the same iron-hungry crop group. This Professional-line version is packaged in 25lb, 80-count case quantities for commercial greenhouse use.

Will this fertilizer affect growing media pH?

It's an acidic formula with moderately high potential acidity, rated at 420 lbs. CCE, and contains no urea. Growers should factor that acidifying effect into their overall pH management plan over an extended feeding program.