Hi grams per liter or quart?

I come up with 1.19 gram per quart of water. At 1 teaspoon per gallon. 4.76 grams = 1 teaspoon. 4.76 divided by 4 quarts. I Goggled teaspoon to gram conversion.

Does this have micro nutrients?

Yes as noted in product description: Guaranteed Analysis Macronutrients: 13.0% Total Nitrogen (Nitrate Nitrogen 12.5%, Ammoniacal Nitrogen 0.7%) 3% Available Phosphate Acid (P2O5) 15.9% Soluble Potash (K2O) 8.0% Calcium (Ca) 2% Magnesium (Mg) Derived from calcium nitrate, magnesium nitrate, potassium nitrate and monopotassium phosphate Micronutrients: 0.177% Iron (Fe) 0.088% Manganese (Mn) 0.044% Zinc (Zn) 0.044% Copper (Cu) 0.018% Boron (B) 0.018% Molybdenum (Mo)

If I use 1/2tsp per gallon of water, do I use it to water once a week?

That's how I've been using MSU Orchid Fertilizer for years. I was given the old trope, "feed them weakly weekly" and find it's good advice. Half label strength once per week.

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MSU Orchid Fertilizer 13-3-15 Reverse Osmosis, Rain, Tap Water Formula 1/2 Pound

MSU Orchid Fertilizer 13-3-15 Reverse Osmosis, Rain, Tap Water Formula 1/2 Pound

Product ID: 14730160

Details

Brand
Jim's Orchid
Item Form
Granules
Item Weight
8 ounces
Liquid Volume
0.5 liters
Manufacturer
GREENCARE INC

🌿Includes Calcium & Magnesium micronutrients

💧Optimized for Reverse Osmosis & Rainwater

🔬Precise 13-3-15 NPK formula

MOP$219

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Description

🌺 Elevate your tropical garden game with the secret sauce of champions!

MICRONUTRIENT BOOST - Calcium and magnesium included for stronger stems and lush foliage
WATER SMART FORMULA - Specifically designed for tap, rain, or reverse osmosis water to maximize absorption
AWARD WINNING SECRET - Trusted by top growers worldwide for prize-winning orchids and tropicals
TAILORED NUTRIENT BLEND - Expertly balanced 13-3-15 formula fuels vibrant tropical growth
UNIVERSAL TROPICAL CARE - Perfect for orchids, anthuriums, monsteras, and philodendrons alike

MSU Orchid Fertilizer 13-3-15 is a premium half-pound granulated formula enriched with essential micronutrients like calcium and magnesium. Designed for use with tap, rain, or reverse osmosis water, it delivers optimal nutrient uptake for orchids and tropical plants. Endorsed by expert growers globally, this fertilizer ensures robust growth and award-winning blooms.

Specifications

ASIN	B00J1BEJB0
Best Sellers Rank	#266,430 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #3,887 in Garden Fertilizers
Brand Name	Jim's Orchid Supplies
Coverage	Medium
Customer Reviews	4.3 4.3 out of 5 stars (57)
Item Form	Granules, Powder
Item Weight	8 ounces
Liquid Volume	0.5 liters
Manufacturer	GREENCARE Fertilizers, INC
Mixing Ratio	1 gram per 3.78541 liters
Model Number	MSURO.5
Number of Items	1
Part Number	MSURO.5
Target Species	Orchids, Anthuriums, Philocdenxdrons, Monstera and other tropicals
Unit Count	8 Ounce

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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MOP$219

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