Here are the top 5 best fertilizer for St. Augustine grass. We made this list based on customer feedback, brand reputation, price, market analysis, personal opinion, and more.
5 Best Fertilizer for St. Augustine Grass Options For Your Lawn
|Southern Ag Atrazine St. Augustine Grass Weed Killer||
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|Ortho Weed B Gon Weed Killer for Lawns Concentrate2||
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|3-IN-1 WEED AND FEED FOR SOUTHERN LAWNS||
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|Scotts Turf Builder Southern Triple Action||
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|Roundup for Lawns 6 Ready-To-Spray||
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Southern Ag Atrazine St. Augustine Grass Weed Killer
- CONTROLS Many common grassy and broadleaf weeds
- Thickens the lawn to crowd out weeds
- Provides suppression of crabgrass
- Kill many broadleaf weeds
- Does not kill grass
- Destroy the crabgrass
- Used on centipede and st. augustine grass
- Cause illness if ingested
- Cannot be used with hose end sprayer
Southern Ag Atrazine St. Augustine Grass Weed Killer is great for use on St. Augustine and centipede lawns. These grass have a sensitivity to other types and herbicides out there. It’s really good as a pre-emergent. But can be applied during growing and dormant periods.
This formula controls emerged weeds and weeds from seeds. When it comes to hard kill weeds in your St. Augustine grass, Atrazine is the best product of choice.
For best results, apply Atrazine to St. Augustine grass in early spring or during dormant periods when the weeds are young. Never spray Atrazine on windy days because it will drift onto other plants.
To apply, you want to mix this at four-point, three ounces per gallon of water and that will cover five hundred square feet. So, depending on the lawn. You’ll have to do the math to figure out your mix in your tank. When you mix this, you want to apply it from a spray tank. This product does need to be watered approximately seven to ten days after application. Not recommended for use with a hose-end sprayer.
Wear gloves, protective clothing, and eye protection during application. Wash up well afterward. Always read the instruction before use.
Ortho Weed B Gon Weed Killer for Lawns Concentrate2
- Kills dandelions, clover and other broadleaf weeds
- Quick action formula
- Grow more green and thick lawn
- Easy to apply
- Kills the weeds, not the lawn
- Rainproof in 1 hour
- For northern and southern lawn
- Not recommended for Floratam grass
Ortho Weed B Gon Weed Killer is the perfect solution for most the northern and southern grass types to kill dandelions, clover, dollarweed, and other broadleaf weeds all the way to the root. While it does not harm your lawn when used as directed. You’ll see tough results on weeds after only a day.
The ready-to-use one-touch comfort wand is great for quickly spot treating small or large areas. But when you need to kill an army of weeds. Apply this product when weeds are actively growing.
This is the best product for Bermudagrass, St. Augustine (excluding Floratam), Centipede, Buffalograss, Bluegrass, Bahiagrass, Ryegrass, and Zoysia.
Just connect the hose directly to the tank sprayer or the dial-in spray.
Best Weed and Feed for St. Augustine Grass: 3-IN-1 WEED AND FEED FOR SOUTHERN LAWNS
- prevents broadleaf, grassy weeds, and crabgrass
- 50% Slow release formula
- Guarantee results
- N-P-K: 35-0-3
- Kill weeds including dollarweed, clover, nutsedge
- Feed, greens and strengthen your lawn
- Won’t harm your lawn when use directed
- Slow release formula
- Do not rake after application
BioAdvanced 3-IN-1 Weed and Feed is specially formulated for southern lawns. It kills listed weeds including dollarweed, dandelion and clover, and crabgrass. Feed, green, and strength your lawn. Just one application delivers up to 6 months of protection.
3-IN-1 weed and feed work on all four major southern turf types including St. Augustine, Bermudagrass, centipedegrass, and zoysiagrass.
It’s like three products in one, save your time and money. Make one application instead of buying and applying weed and feed products around the season.
Apply to only actively growing turf. In spring, mow your lawns two times. This ensures your lawn emerges from dormancy. 3-IN-1 weed and feed is a granular product. You can apply with a drop-type spreader. Check the spreader setting for the application.
Treat the border of your lawn first, then fill the center by making parallel passes. Be sure to avoid overlapping.
Remember to sweep, brush or blow any access granules from the sidewalk, patios, and driveway, back onto the lawns. You get the thicker and greener lawn, longer root, and rich soil.
Once the 3-IN-1 weed and feed is down, wait 24 hours and lightly water in. This will activate the crabgrass barrier and last up to 6 months.
You can make the second application in the fall. It will kill dollarweed and prevent poa annua. Check the label for timing and application. Once you applied, do not rake your lawn. Because heavy raking can break up the weed barrier.
Follow these tips and label instructions for the cast and time-saving benefits from the product.
Scotts Turf Builder Southern Triple Action
- Feed and strengthen your lawn
- Prevents and kill fire ants
- easy to use
- N-P-K: 29-0-10
- Kills the weeds
- Feed the lawn
- Prevents the weeds to grow
- Strengthen heat and drought resistant
Scotts turf builder southern triple-action kills the toughest weeds including dandelion chickweed, oxalis, plantain, and clover from the lawn. This application also kills fire ants, fleas, mole crickets, and chinch bugs. And fertilize your lawn for building thick, green, and healthy lawns.
Scott’s turf builder works on all major southern turf types including St. Augustine, Bermudagrass, centipedegrass, and zoysiagrass.
Scott’s turf builder can be applied when weeds are actively growing. Apply this product directly to the lawn area. And do not water to the point of runoff. Do not apply more than twice per year.
This product is easy to use. Just collect the size of the area. Put into the spreader and adjust the setting of the spreader according to the label and apply. This product strengthens your lawn against heat and drought resistance.
Apply this product once in the spring and once in the fall. Use this product to a dry lawn with the spreader. The product must be water in after application immediately.
Roundup for Lawns 6 Ready-To-Spray
- Specifically formulated for Southern grass types
- Kill the toughest weeds down to the roots
- Kill more than 90 types of weeds
- Easy to use
- Kill weeds, not the lawn
- Covers up to 6000 square feet
- Starts working immediately
- Not recommended for dichondra, carpetegrass, and desirable clover
- Avoid applying in fall or winter
Roundup Ready-To-Spray kills the toughest weeds including dollarweed, clover, dandelion, yellow nutsedge, and 90 other listed weeds down to the roots. The formula is specifically designed to kill the weeds, not the lawn.
It’s the best weed and feed spray for southern grasses, such as St. Augustine (including Floratam), Centipedegrass, Bermudagrass, and Zoysia. Remember, do not use this product on bentgrass, carpetgrass, dichondra, and the desirable clover.
This formula works best when weeds are actively growing. It stops the growth of the weed and kills the weeds down to the roots, so weeds won’t come back.
Simply connect it with the garden hose spray, turn on the water and start spraying. Shake well before using. People and pets may enter the treated area after the spray has dried.
Best Fertilizer for St. Augustine Grass Buyer’s Guide
A definitive guide for buying the best fertilizer for st. Augustine grass will help you in selecting the best product and help you in making the lawn more beautiful and healthy.
Post or Pre-emergent
Two main types of herbicides are available pre-emergent and post-emergent. Pre-emergent herbicides work by preventing weeds from growing. Post-emergent, on the other hand, attacks actively growing weeds in your St. Augustine grass lawn.
For best controlling the weeds, apply the pre-emergent fertilizer during the daytime when no rain is expected within 24 hours for four consecutive days.
Fall applications help prevent winter annuals and other weeds from popping up; in fall, wait until nighttime lows remain between 55 and 60 degrees Fahrenheit for four consecutive days, typically in September.
After applying granular pre-emergent application over the lawn, make sure to apply one and half an inch of water immediately.
A common crabgrass preventive product containing benefin and trifluralin recommends applying at a rate of 2 ¼ to 3 ¼ pounds of granules per one thousand square feet of turf. Products vary inactive ingredients and application rates; read the instructions carefully before applying.
Pre-emergence herbicides are the best weapon against crabgrass. If you can apply it in time, the pre-emergent herbicide is the best to use for St. Augustine and all grasses because it prevents the germination of weeds.
Reading the label
Before applying any herbicide, it’s important to know what to look for on the label. Herbicide products often target only a certain selection of weeds. First find out, what weeds you have growing in your lawn.
To know whether or not the product you choose is safe for St. Augustine grass read the product label to see if it is listed for use on St. Augustine grass.