Greenhouse Grower Fertilizers

Jacks Dark Weather Fertilizer 15-0-15

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The traditional high-calcium fertilizer (11%) for growers who need to supplement their fertilizer programs with calcium.  Alternate with 20-10-20 Peat-Lite or use as a "finisher" for flowering plants like poinsettias.  This formula has the traditional micronutrient levels needed for general production.

Jacks Peat Lite Fertilizer 15-16-17

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Similar to 20-20-20 but with over 60% nitrate nitrogen, boosted micronutrient levels and much less acidic reaction in the root media!  The balanced N-P-K ratio is excellent for producing fast-growing plants or for maintaining plants in a sales environment.

Jacks Poinsettia Peat-Lite 15-5-25

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This fertilizer contains more than 70% nitrate nitrogen and has a micronutrient package adjusted for poinsettias (lower boron and increased magnesium, zinc and molybdenum.) An ideal choice for low alkalinity waters when the feed program is supplemented with calcium-containing products.

Jacks General Purpose Fertilizer 20-10-20

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One of the most popular formulations, 20-10-20 GP has the traditional micronutrient levels needed for general production including propagation and all types of bedding plants.  High nitrate nitrogen levels (60% of the total) provides for green foliage and more compact growth.

Jacks Peat-Lite Fertilizer 20-10-20

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The most popular formulation, 20-10-20 Peat-Lite has approximately twice the level of micronutrients as the GP formulation.  The additional level of micronutrients provides necessary elements absent from most commercially made peat-lite potting media.

Jacks Poinsettia FeED Mg Fertilizer 17-5-19

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This product is designed to fit the needs of the newer poinsettia cultivars that need the micronutrients, but a lesser amount of macronutrients.  It contains 50% more micronutrients than a typical poinsettia peat-lite formula, yet it provides less boron.  The iron is derived from three chelate sources to keep it available over a wide range of growing medium pH values.  It provides 1 ppm of molybdenum for each 200 ppm of nitrogen and contains additional magnesium and high nitrate nitrogen levels.

Scotts All Purpose Fertilizer 21-5-20

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This is the ideal fertilizer for moderate to high alkalinity waters.  It is formulated with over 60% nitrate nitrogen and a peat-lite level of micronutrients.  It can be tank-mixed with 15-5-15 and other Jack's LX Formulas.

Jacks Petunia FeED Fertilizer 20-3-19

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This product is specially formulated for those chronically iron-hungry crops such as petunia, calibrachoa, bacopa and others.  It contains double the iron of peat-lite formulations, derived from three chelate sources to keep it available over a broad range of growing medium pH values.  It contains 60% nitrate nitrogen, magnesium and no urea.  The low phosphorus level helps prevent excessive elongation.  It is not recommended for use on geraniums or other iron sensitive crops.

Jacks Blossom Booster Fertilizer 10-30-20

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Use this high phosphorus formulation during periods of bud set to increase number and size of blossoms.  Resume use of traditional production fertilizers for the remainder of growing cycle to avoid internode stretch.  Great for vegetable production.

Ammonium Molybdate

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Used as a fertilizer supplement for poinsettias and many vegetable crops.  It can be incorporated into the liquid feed program or used as a foliar spray.