Fertilizers
Monoammonium Phosphate (MAP)
A nitrogen and phosphate source; the supplied guide describes the soluble 12-61-0 grade.
Explore the guideFertilizers
Match this name to your package.01 / UNDERSTAND
What is Monoammonium Phosphate (MAP)?
A nitrogen and phosphate source; the supplied guide describes the soluble 12-61-0 grade.
Start with the right purpose
Confirm that the bag is the 12-61-0 soluble grade, since other MAP grades exist.
Before you begin
Keep phosphate concentrates separate from calcium fertilizers. Extra phosphorus is not automatically beneficial at planting or flowering.
02 / MEASURE
How much to apply
Amounts from the supplied product instructions.
SUPPLIED APPLICATION RATE
General Garden Use Mix 2.5 g (about ½ tsp) with 4 L (1 gal) of water . Apply to the soil around the root zone every 2–4 weeks when additional phosphorus is needed. Seedlings and Young Plants Mix 1–1.5 g per 4 L (1 gal) of water . Apply after seedlings have developed established roots. Use every 2–3 weeks as needed. Transplanting Mix 2–2.5 g per 4 L (1 gal) of water . Apply around the root zone after transplanting to encourage root establishment. Repeat once after 10–14 days if needed. Established Vegetables and Flowers Mix 2.5 g per 4 L (1 gal) of water . Apply during early growth or before flowering. Avoid using continuously throughout the entire growing season unless phosphorus is known to be deficient.
Source: Guide_Monoammonium Phosphate (MAP).pdf. These are the supplied guide’s rates, not independently verified manufacturer directions. Follow the exact product label if it differs.
03 / APPLY
How to apply
Directions from the supplied product guide.
General Garden Use Mix 2.5 g (about ½ tsp) with 4 L (1 gal) of water . Apply to the soil around the root zone every 2–4 weeks when additional phosphorus is needed. Seedlings and Young Plants Mix 1–1.5 g per 4 L (1 gal) of water . Apply after seedlings have developed established roots. Use every 2–3 weeks as needed. Transplanting Mix 2–2.5 g per 4 L (1 gal) of water . Apply around the root zone after transplanting to encourage root establishment. Repeat once after 10–14 days if needed. Established Vegetables and Flowers Mix 2.5 g per 4 L (1 gal) of water . Apply during early growth or before flowering. Avoid using continuously throughout the entire growing season unless phosphorus is known to be deficient.
Keep phosphate concentrates separate from calcium fertilizers. Extra phosphorus is not automatically beneficial at planting or flowering.
04 / TIMING
When to apply
Use MAP during stages when phosphorus demand is highest, including:
Seedlings and young plants – supports early root development.
After transplanting – helps plants establish a stronger root system.
Early vegetative growth – supports root expansion before rapid top growth.
Before flowering – useful when additional phosphorus is needed before bloom development.
Phosphorus-deficient plants – may help when soil or growing media has insufficient available phosphorus. MAP is suitable for vegetables, flowers, fruiting plants, shrubs, trees, and container plants.
Use the interval stated in the supplied directions above. Where none is specified, follow the exact product label.
Record the amount and application date. Consider your growing conditions before repeating.
05 / GOOD HABITS
Tips & things to avoid
Helpful habits
- Confirm that the bag is the 12-61-0 soluble grade, since other MAP grades exist.
- Keep the package label and record the date, amount and method used.
- Keep phosphate concentrates separate from calcium fertilizers. Extra phosphorus is not automatically beneficial at planting or flowering.
Things to avoid
- Do not choose an amount from the product name alone; confirm the formulation and intended use.
- Do not transfer the dose or interval from a different product.
- Do not treat a general guide as a substitute for the exact product label.
06 / QUICK ANSWERS
Common questions
How do I choose the amount?
Use the supplied amounts in the dosage panel above for the stated application. Match the product and growing method to your package.
What should I check first?
Confirm that the bag is the 12-61-0 soluble grade, since other MAP grades exist.
Can I repeat the same application?
Follow the repeat interval in the supplied directions, where stated, and check the exact product label.
What needs particular care with this product?
Keep phosphate concentrates separate from calcium fertilizers. Extra phosphorus is not automatically beneficial at planting or flowering.
Sources and rate verification
Based on your saved instructions: Guide_Monoammonium Phosphate (MAP).pdf. The saved review does not verify an exact product dose. These references support general principles, not manufacturer approval.
Removed automatic seedling/transplant schedules and spoon conversions. High phosphorus does not automatically improve establishment where phosphorus is sufficient. Do not mix with calcium concentrates.
07 / RELATED GUIDES
Explore other product guides
Compare purposes before choosing a product. These are not instructions to combine products.
GROW BETTER. TOGETHER.
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