what does it mean if fertilizer is labelled 10-20-5?

Answer 1

the three numbers represent different percentages of minerals

Nitrogen - phosphorus - potassium

What does N-P-K stand for?

N = Nitrogen Nitrogen is the first major element responsible for the vegetative growth of plants above ground. With a good supply, plants grow sturdily and mature rapidly, with rich, dark green foliage.

P = Phosphorus
The second major element in plant nutrition, phosphorus is essential for healthy growth, strong roots, fruit and flower development, and greater resistance to disease.


K = Potassium (Potash) The third major plant nutrient, potassium oxide is essential for the development of strong plants. It helps plants to resist diseases, protects them from the cold and protects during dry weather by preventing excessive water loss.

In your case, the middle number is high - this will be good if you are trying to get a lot of flowers or fruits from a plant.

Answer 2

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If you do use this fertilizer, be very careful, as you could damage your plants. Here are some recommended articles and sites. N-P-K (Nitrogen- Phosphorus- Potassium) are the 3 most abundant ingredients listed on EVERY fertilizer label. They are always in this order, N-P-K. You will see them on the label as three numbers.Such as: 30-10-10 / 10-5-5- / 21-0-0- But what does it mean and how do you know which formula you need? The first example, 30-10-10, means that if you had 100 pounds of that fertilizer there would be 30 pounds of available nitrogen, 10 pounds of available phosphorus and 10 pounds of available potassium (potash). The remaining 50 pounds are inert or inactive ingredients. Do not fertilize plants in the hot sun. This can cause leaf burn and damage the plant. Do not fertilize plants when the soil is dry. This can cause the roots to get damaged, alaways make the soil is moist. Most seedlings do not benefit from fertilizer use. Wait until you feel the plant is old enough (3-4 weeks) to safely apply any fertilizer. When starting to fertilize very young plants do so sparingly. Your tomatoes need a proper "balance" of nutrients. Packaged fertilizer should include on its label the Nitrogen, Phosphorous and Potassium ratio of 5-10-10 or 10-10-10. For best results, stay with these numbers; since, a change from the stated numerical format like 20-5-5 [too much nitrogen] will create tall, very green, leafy tomato plants with little or no tomatoes. Fertilize every two to four weeks. Fertilizers high in nitrogen will result in a leafy, green plant at the expense of root development. A good fertilizer for sweet potatoes and yams contain low levels of Nitrogen, and high levels of phosphorus. 6-24-24, or 8-24-24, are good fertilizers for sweet potatoes. Fertilization Sweet corn grows best at a soil pH of 6.0 to 6.8 (soil acidity/alkalinity) and with a good supply of nutrients. Wellaged manure or compost incorporated into the soil before planting will provide nutrients and increase waterholding capacity. Generally, corn needs a nutrient supply equal to the application of about 25 pounds per 1,000 square feet of 10-10-10 fertilizer (this is about 1,000 pounds per acre). Equivalent rates of other analyses such as 15-15-15, 20-20-20, etc., or organic

Answer 3

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RE:
what does it mean if fertilizer is labelled 10-20-5?

Answer 4

The numbers are the percentage, by weight, of Nitrogen, Phosphorous, and Potassium, respectively. If you want to fertilize a one acre yard with 60 lbs. per acre of Nitrogen, you would need to apply 600 lbs. of 10-25-5 (10% of 600 lbs. = 60 lbs.).
This mix is unusually high in Phosporous. A proportion of 1-.5-1 would be more typical. That is N and K in a 1:1 ratio, with about half of that amount of Phosphorous. For example a 10-5-10, or 20-10-20.

Answer 5

the first number 10 is the amount of nitrogen. the second number 20 is the amount of phosphorous. the third number 5 is the amount of potash in the fertilizer. the nitrogen is for the greening of the plant . your leaves will yellow with out the nitrogen. the phosphorous is to ensure lots of blooms and or fruit. and the potash takes care of the over all health of the plant . size of leaves, size of root system, etc....

Answer 6

The first number is the amount of nitrogen in the fertilizer.The second number is the amount of phosphorous, and the third is the amount of potassium. Different plants require different amounts of each of these macro nutrients. That's why you see different numbers on different packages. The package usually will tell you what plants or trees it should be used on. Check out the website below. It should be of more help.

Answer 7

Hi! Take what itchybubbles said and simplify it to this:
UP-DOWN-ALL AROUND
10-20-5
So 10 is good for top growth and flowers
20 is for root growth
5 is all around nutrition.
I am simple minded so I need simple reminders!!!!!!!