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SOUTHERN AGRICULTURAL PRODUCTS

Start, Root, and Bloom Water Soluble Fertilizer 10-30-20

Start, Root, and Bloom Water Soluble Fertilizer 10-30-20 is a powerful phosphorus boost fertilizer that ignites explosive root growth and vibrant blooms, making it the go-to choice for transplanting and supercharging flowers, vegetables, houseplants, and more.

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Start, Root, and Bloom Water Soluble Fertilizer Product Page
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Price as of
04/01/26
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Start, Root, and Bloom Water Soluble Fertilizer 10-30-20, manufactured by Southern Agricultural Products, is a high-phosphorus, fast-acting water soluble fertilizer that encourage strong root growth and abundant bloomage in various outdoor plants and houseplants.

This nutrient packed fertilizer contains a 10-30-20 npk ratio, which fuels leafy growth and overall plant health, encourages strong root systems and abundant blooms. It also strengthens plants, improves disease resistance, and enhances fruit/flower quality. Additionally, it contains chelated micronutrients, which ensure that plants receive a full spectrum of essential trace elements for well-rounded nutrition and deeper greening.

Start, Root, and Bloom Water Soluble Fertilizer 10-30-20 is a powerful, versatile plant food that promotes healthier plants, more vibrant flowers, stronger transplants, and bigger harvests for the average grower. From flowers and roses to vegetables, shrubs, trees, and houseplants, this fertilizer adapts to whatever you’re growing. The high phosphorus content makes it especially valuable during transplanting and blooming phases, while the balanced nitrogen and potassium support overall growth and plant health.

Tools Needed

You will need a watering can, handheld sprayer, or backpack sprayer. 

How to Use

  • Step 1: Determine how much Start, Root, and Bloom Water Soluble Fertilizer 10-30-20 to use by measuring the square footage of the treatment area. Find the square footage by measuring the treatment area's length and width in feet, then multiply them together (length X width = square footage). For a transplanting solution, mix 2 tablespoonfuls of Start, Root, and Bloom Water Soluble Fertilizer 10-30-20 per gallon of water. For soil application to outdoor plants, mix 1 tablespoonful of product per 1 gallon of water. Soak the root area using about 1 gallon of solution per 4 square feet of bed area with a water can or hose end applicator. For foliar feeding, use 1 tablespoonful of product per gallon of water. For houseplants with large containers and pots, use 2 teaspoons per gallon. For small potted plants, apply a lower rate of 1 teaspoonful per gallon or 1/4 teaspoon per quart.
  • Step 2: Fill the sprayer with half the amount of water, add the proper amount of product, and pour in the remaining half of the water. Close the tank lid and shake until evenly mixed. 
  • Step 3: Cover foliage completely with spray. Repeat every 1 to 2 weeks during active growing seasons as a drench application on outdoor plants. For foliage applications on outdoor plants, apply every 1 to 2 weeks or as needed. Use every 1 to 2 weeks when you water, or as needed for houseplants. 

Where to Use

Start, Root, and Bloom Water Soluble Fertilizer 10-30-20 can be used for flowers, roses, houseplants, vegetables, shrubs and trees. 

When to Use

Apply during transplanting, early growth, and pre-bloom stages to encourage strong root development and vibrant flowering. 

Safety Information

Start, Root, and Bloom Water Soluble Fertilizer 10-30-20 is safe for people and pets when applied according to the product label instructions. Always wear the proper personal protective equipment (PPE) when mixing and applying this product. 

Special Considerations

Use during specific growth phases rather than as a general-purpose fertilizer.

More Information
Restricted Use No
Availability Online
Keith's Pro Tip "Most houseplants prefer to dry slightly between waterings. Stick your finger an inch into the soil if it’s dry, it’s time to water."
Time to Kill Start, Root, and Bloom Water Soluble Fertilizer 10-30-20 will work within several days.
Chemical Type Fertilizer
Formulation Water-Soluble Powder
Application Methods Broadcast Spray, Spot Treatment
Product Drawbacks Its high phosphorus content is ideal for rooting and blooming but not suitable for long-term use during leafy or vegetative growth.
Active Ingredient Nitrogen 10.00% Phosphoric Acid 30.00% Soluble Potash 20.00%
Application Equipment Backpack Sprayer, Pump Sprayer
Mix Rate For a transplanting solution, mix 2 tablespoonfuls of Start, Root, and Bloom Water Soluble Fertilizer 10-30-20 per gallon of water. For soil application to outdoor plants, mix 1 tablespoonful of product per 1 gallon of water. Soak the root area using about 1 gallon of solution per 4 square feet of bed area with a water can or hose end applicator. For foliar feeding, use 1 tablespoonful of product per gallon of water. For houseplants with large containers and pots, use 2 teaspoons per gallon. For small potted plants, apply a lower rate of 1 teaspoonful per gallon or 1/4 teaspoon per quart.
Use Sites Outdoors
Yield Coverage will vary.
EPA Registration No. N/A
Shelf Life Start, Root, and Bloom Water Soluble Fertilizer 10-30-20 will last for 3 years when stored in a dry, clean area.
Comparable Products CoRoN 18-3-6 Plus 0.5% fe Liquid Fertilizer
Children or pets? No
Property Characteristics None
AvailabilityOnline
Restricted UseNo
BrandSOUTHERN AGRICULTURAL PRODUCTS
Keith's Pro Tips"Most houseplants prefer to dry slightly between waterings. Stick your finger an inch into the soil if it’s dry, it’s time to water."
Product DrawbacksIts high phosphorus content is ideal for rooting and blooming but not suitable for long-term use during leafy or vegetative growth.
Application EquipmentBackpack Sprayer, Pump Sprayer
Application MethodsBroadcast Spray, Spot Treatment
Active IngredientNitrogen 10.00% Phosphoric Acid 30.00% Soluble Potash 20.00%
Product TypeFertilizer
FormulationWater-Soluble Powder
Application RateFor a transplanting solution, mix 2 tablespoonfuls of Start, Root, and Bloom Water Soluble Fertilizer 10-30-20 per gallon of water. For soil application to outdoor plants, mix 1 tablespoonful of product per 1 gallon of water. Soak the root area using about 1 gallon of solution per 4 square feet of bed area with a water can or hose end applicator. For foliar feeding, use 1 tablespoonful of product per gallon of water. For houseplants with large containers and pots, use 2 teaspoons per gallon. For small potted plants, apply a lower rate of 1 teaspoonful per gallon or 1/4 teaspoon per quart.
Shelf LifeStart, Root, and Bloom Water Soluble Fertilizer 10-30-20 will last for 3 years when stored in a dry, clean area.
YieldCoverage will vary.
Use SitesOutdoors
Time to KillStart, Root, and Bloom Water Soluble Fertilizer 10-30-20 will work within several days.
Comparable ProductsCoRoN 18-3-6 Plus 0.5% fe Liquid Fertilizer
Incompatible Home SidingMetal
EPA Registration #N/A

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