7 Best Fertilizer For Sunflowers 2024 Reviewed

In summary:  a water flower Bloom Booster from Miracle-Gro was our Best fertilizer for sunflowers. On the other hand, Espoma FT4 4-Pound Flower-tone took our (Helianthus spp.) sunflower feed runners up position. Interestingly, all the ingredients of the two fertilizer brands are 100% organic.

Fertilizer for sunflowers recommended NPK fertilizer ratio should be when fertilizing sunflowers in pots. While is NPK fertilizer ratio is compatible with a yard or raised bed sunflowers. Below find our sunflower fertilizer requirements reviews and buyers guide.

Reviews: 7 Best Fertilizer For Sunflowers 2024 Reviewed

1.Miracle-Gro Sunflower  Liquid Fertilizer

Find Miracle-Gro, which is 100% organic fertilizer as our top sunflower fertilizer. It comes with all the primary plant nutrients. Due to this reason, Miracle-Gro has an improved ability to cater to all sunflower fertilizer requirements effectively. In case you are looking for ways to improve how much does a sunflower grows in a week, then   Miracle-Gro is a great way to get started.

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Moreover, it features an organic formula. As a result, it is kids and pets friendly. It has high-quality phosphate ingredients. Due to this reason, phosphate present encourages sunflowers to form a healthy root system.

Fertigation and foliar application modes of fertilizer application are compatible with Miracle-Gro as it is water-soluble fertilizer.

Manganese (Mn) present plays a significant role in reducing sunflower student growth instances. For effective results such as extra-large sunflower, blooms consider using this Miracle-Gr after every four weeks.

The basic functionality of the nitrogen present in this fertilizer is to allow lush green vegetation growth in all sunflowers varieties. Additionally, high magnesium (Mg) nutrient available in the water-soluble Miracle-Gro controls the yellowing of sunflower leaves.

  • Induces rooting
  • Controls leave yellowing \
  • Increase flower size
  • Promotes vegetative growth
  • Slow-release

2.General Hydroponics liquid fertilizer for sunflowers

Up next, find a bio-fertilizer that acts as a dual-duty product as it serves a sunflower fertilizer and a weed control option. Moreover, General Hydroponics is a liquid fertilizer and also have readily available sunflower NPK fertilizer nutrient requirement.It features an appropriate amount of Sulphur to protect sunflowers professionally leaves chlorotic condition.best type of fertilizer for sunflowers

Another interesting thing about   General Hydroponic is that it promotes soil microbe’s growth as it is a natural sunflower fertilizer. Another advantage is that it comes with a nonburning formula. As a result, it is compatible with a house plant, flowers, and food plants such as vegetables.

Besides featuring a high percentage of phosphorus, it was also our best liquid fertilizer for sunflowers. As a result, it allows sunflowers to establish a rapid roots system when growing sunflowers in pots.

Iron (Fe) present protect sunflower from the formation of brown spots on leaves and stems. Similarly, the iron present is responsible for maintaining a dark green leaves color.

  • Easy to use
  • Consistency
  • Instant result
  • Promotes blooming
  • Liquid fertilizer

3.Down To Earth Organic Fertilizer For Giant Sunflowers

Third, on our list, find an all-purpose sunflower fertilizer from Down To Earth. It comes with the overall NPK sunflower fertilizer ratio. Furthermore, it employs a nonburning formula. As a result, it is compatible with young and mature sunflower plants.best fertilizer for giant sunflowers

Additionally, phosphorus (P) present encourages the formation of extensive and robust sunflower roots. Also, it prevents conditions such as yellowing or sunflower leaves from occurring.

Also, it works dual duty as a fertilizer and as a weed control agent. Copper (Cu) ingredient controls withering in sunflower leaves and flower tips.

Calcium (Ca) ingredient present minimizes dying back and formation of brown spots on sunflower leaves. Similarly, Calcium (Ca) reduces instances of young sunflower terminal buds dying again.

Readily available potassium (K) present is responsible for controlling Interveinal chlorosis on sunflower leaf margins. The potassium (K) present is equally important as it also enhances the over sunflower yellow blooms colour.

  • Easy to work use
  • Readily available
  • Effective
  • Decently priced
  • Granular fertilizer

4.Growth Science Organic Sunflower Fertilizer  Nutrients

Forth on our list, find an excellent organic sunflower fertilizer from Growth Science Nutrients.it is an all-purpose fertilizer as it is highly concentrated. Also, it has a high amount of Endomycorrhizal Fungi, which are 100% beneficial soil bacteria improves.best liquid fertilizer for sunflowers

Therefore, Growth Science Organic improves overall sunflower potting mix soil structure. Molybdenum (Mo) nutrient present ensures that the sunflower plant can maintain a green color on all older leave by correcting the yellowing condition.

Amazingly, it has a high phosphorus nutrient ingredient. The leading roles of phosphorus ingredients are to allow the formation of a rapid root system when growing sunflowers from seeds.

Additionally, phosphorus ingredient is 100% responsible for preventing the formation of yellow stripes on sunflowers leaves. It has a moderate amount of boron, which moderates early sunflower leaf dieback.

It is also a rich source of bone meal and worm casting. As a result, worm casting present improves soil structure and also boost the growth of soil microbes. Besides being a rich source of natural plant nutrients, it comes with an appropriate amount of magnesium (Mg). The magnesium (Mg) present controls Leaf margin chlorosis or scorching on sunflower leaves.

  • Nonburning formula
  • Effective
  • Promotes blooming
  • Short shelf life

5.Miracle-Gro Fertilizer Food Spikes For Sunflowers

Either when growing sunflowers in clays soil or your yard, consider using these Miracle-Gro spikes as your preferred sunflowers fertilizer. These fertilizer spikes have a high percentage of copper (Cu).Best Fertilizer For Sunflowers

Therefore, copper (Cu) enhances the formation of strong sunflower branches and twig. Interestingly, it features high phosphorus (P). Thus Miracle-Gro promotes the creation of a robust sunflower root system.

High potassium present encourages the formation of large and conspicuous sunflower blooms. Similarly, copper (Cu) nutrient presents control early sunflower bud fall. One of the fantastic features of these spikes is that they have a high zinc (Zn) ingredient.

Also, it features an average percentage of zinc (Zn) ingredients. The primary role zinc (Zn) is to modify and also correct yellowing conditions on sunflower leaf veins.

For effective results, consider feeding your sunflower with these spikes in early spring and later on during late fall. Additionally, phosphorus (P) present reduces the delayed maturity of sunflower seeds.

  • Induces rooting
  • Easy application
  • GMO-free
  • Reduces premature leaf fall
  • Spikes forms.

6.Jobe’s Organics 16 Lb Granular Fertilizer For Sunflowers,

Six on our list find this fantastic fertilizer which comes jobes. It offers slow release and nonburning formula. Interestingly the quiet release formula nature allows this jobes fertilizer to feed your plants for over ten weeks.best organic fertilizer for sunflowers

The high iron content ensures that the jobes fertilizer comes with a non-leaching nature. As a result, you can use it on lawns and in a vegetable garden from corner to corner. To encourage the growth of lush green vegetation slightly giant sunflower leaves, you can formulate the granules either during summer or winter.

There are lots of factors to consider as sunflowers are a carnivorous plant. Consider deciding whether you are growing to be planting to plant dwarf or giant sunflower verities. Below find our step by step guide on how to grow sunflowers indoors successfully.

Another advantage is that the nonburning slow resale nature protects sunflower leave and flowers from burning. Additionally, it has a slightly high amount of nitrogen, which is responsible for promoting an increase in vegetation and bud formation vigour. Besides being a granular fertilizer, it is 100% soluble in water. As a result, jobes organic is compatible with fertigation or foliar fertilizer formulation options.

  • Soluble in water
  • Easy to use
  • Readily available
  • Effective
  • Granular nature

7.Osmocote Granules Organic Plant Food 1 Lb.

The last product on our list comes from Osmocote. What is more amazing about this fertilizer is that it comes in granules form. As a result, it is 100% easy to formulate. Additionally, it offers a water-soluble nature. Hence it can easily be formulated together with irrigation water.best fertilizer for growing sunflowers

Similarly, by Osmocote Granules Organic being water-soluble, it is compatible with foliar fertilizer formulation options. It comes with a long-lasting iron (Fe). As a result, it maintains a dark green sunflower leaves colour for a slightly more extended period.

Growing sunflowers in pots indoors is not an essential task ad most people expect as you will be building it in virtual environments.

This reason, zinc (Zn) helps in correcting sunflower terminal buds that have a resetting condition. By coming with phosphorus as one of the significant flower ingredients, phosphorus initiates large sunflower formation. Lastly, it features a slightly high percentage s of magnesium (Mg) to minimize both browning and yellowing of sunflower leaves in advance.

  • Easy to use
  • Water-soluble
  • Organic
  • Commercial grade
  • Granular nature.


The best time to fertilizer sunflowers is during seed planting, bud formation, and flowering ng stages. When planting sunflowers from seeds, consider going for phosphate fertilizers should be given a top priority. Due to this reason, phosphate fertilizer promotes the formation of early leaf in young sunflower plants.

Miracle-Gro Bloom Booster was our favorite Best Fertilizer for Sunflowers currently on the market. It is compatible with all sunflower growth stages. Consider giving natural fertilizer for sunflowers such as Miracle-Gro Bloom Booster. Another advantage of using natural fertilizer is that the resulting sunflower seed is free from GMO compounds. As a result, sunflower seeds soil is loose from cancer-causing compounds.


"I'm Rob a keen Botanist & Horticulturist, passionate about home gardening, lawns, yards, and orchards. What's your favorite? Let's get to work!"

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