Kelp/Seaweed Extract Powder Recommended Foliar Application.
Here is the test report and approval of chitosan by US EPA for use in agriculture & horticulture.
Field tests report.
The Royal Horticultural Society opinion on seaweed as organic fertilizer.
Nutrient Functions and Deficiency Symptoms.
Biopesticide Registration Action Document of Laminarin from seaweed by US EPA.
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Apply 1-1.5Kg/ha or 300-500g/Acre | ||
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Fruits | Timing | General Application |
Grapes | 20~30cm cane → 45~60cm cane → Full blooming → repeat every 2-3 weeks. | |
Apples/Pears | Green tip → Pre-bloom → pink bud → Full blooming → Early fruit formation. | Every 3 weeks. |
Citrus | Early bloom → Petal fall. | Every 3 weeks. |
Bananas | Plant emergence → 5-10 days later → Fruit at half size. | Every 3weeks. |
Strawberry & other berries | Right after transplant → Before bloom. | Every 3 weeks and after each picking. |
Plums & Cherries | At budding → Full bloom → Early Fruit Formation. | Every 3 weeks. |
Plant | Dilution | Timing |
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Roses | 1:3000 | Every month and after each pruning or cutting. |
1:1000 | At the beginning of the growing season. Soak the soil with 200-300ml 3 times per week; subsequently, once a month | |
Lupins | 1:3000 | Spray once after 3-6 weeks of emergence. |
Other flowering and Ornamental plants | 1:1000 | After transplanting, soak the soil around the seedling with ∼ 100ml. |
1:5000 | Spray every 2 weeks. | |
Turf and Golf Courses (600-800g/ha) | 1:5000 | Once or twice per month. More effective to apply often at a lower concentration. |
Fairways (300-400g/ha) | ||
Pasture (1Kg/ha) | Spray during early growth after emergence, grazing or cutting. | |
Hay/Meadow (1-1.5Kg/ha) | Spray 2 weeks after emergence or when the hay is ∼ 6-8” tall; repeat 2 to 3 times with 3-4 week intervals. |
Fungi | Dilution | Timing |
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Mushroom | 1:3000 | size of mushroom head is 1-1.5 cm →size of mushroom head is 3 cm |
Compost enrichment and degradation
The degradation rate and quality of compost can be improved by addition of diluted kelp extract. For example, add 500g to 2 Kg of kelp powder to make 100L of compost. To make sure even distribution of kelp extract on the compost. One should dilute the kelp powder with water at 200-300 times, and then sprinkle the liquid to the compost.