Granted Patent B2

US 12,391,630 · App. 17/266,677 · Granted Aug 19, 2025

Inventors: Matthew Blanchard (Gilroy, CA); James Lloyd Gibson (Gilroy, CA)

Assignee: Syngenta Crop Protection AG

C05G5/45

Abstract

Claims (16)

1. A plant fertilization pouch comprising:

a) a fertilizer composition comprising controlled release fertilizer; and

b) a hot water-soluble pouch encapsulating said fertilizer composition, wherein the hot water-soluble pouch dissolves in water only at 41 to 80 degrees Celsius.

2. The pouch of claim 1 , wherein said hot water soluble pouch comprises polyvinyl alcohol film.

3. The pouch of claim 1 , wherein the polyvinyl alcohol film is 50 μm gauge hot water (HW) soluble film.

4. The pouch of claim 1 , wherein the polyvinyl alcohol film is selected from the group consisting of 1.0-3.0 Mil hot water soluble film.

5. A method of reducing leached nutrients:

a) packing fertilizer into hot water-soluble PVA packs;

b) adding the fertilizer pack of step a) to a potted plant; and

c) watering the potted plant as necessary,

wherein the amount of leached nutrients is reduced compared to fertilizer alone, wherein the hot water-soluble pouch dissolves in water only at 41 to 80 degrees Celsius.

6. The method of claim 5 , wherein the leached nutrients which are reduced by the hot water-soluble polyvinyl alcohol pouch are selected from the group consisting of: Iron, Manganese, Copper, Bicarbonate, Zinc, Phosphorus, Molybdenum, Ammonia, Nitrogen, Calcium, Potassium, Sulfate, Magnesium, Sodium, Chloride, Inorganic Nitrogen, and Total Nitrogen.

7. A method of treating a plant comprising:

(a) placing a plant into a hole;

(b) placing into said hole, at least one polyvinyl alcohol pouch, wherein said pouch forms an enclosed space and wherein the polyvinal alcohol is 50 μm gauge hot water (HW) soluble film; and

(c) watering said plant, wherein the hot water-soluble pouch dissolves in water only at 41 to 80 degrees Celsius.

Assignments (2)

Continuity (2)

References Cited (10)