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Fertilizing Aquatic Plants – Keeping your aquatic plant blooming at their best | Learning Center


Behind the scenes your Aquatic Plants are working hard to filter nutrients from the water in your pond, provide shelter for its residents, and keep algae blooms to a minimum. While this may seem impressive to some, it is hard for most pond owners to get excited about aquatic plants unless they can do all of this work while looking good. Whoever coined the phrase “Looks aren’t everything” obviously never owned a water garden.

Choosing a Fertilizer
If your aquatic plants are failing to impress you can use some plant fertilizer to give them the boost they need to ensure your pond has more buds and less duds this season. The type of fertilizer you use will depend on the type of plants in your pond and how they are implemented.

Liquid fertilizers like Microbe-Lift® Bloom & Grow™ are mixed directly into your pond water, providing a readily available food source throughout the entire pond. This type of application is great for ponds with an abundance of scattered plants, Floating Plants, and plants that are in areas lacking planting media.

Concentrated fertilizers like CrystalClear® Thrive™ and Laguna Plant Grow Fertilizer Spikes are used for potted plants or plants with roots planted in media. Simply push these fertilizers into the planting media and they will gradually release nutrients that your plants need. When you are using concentrated fertilizers in your pond, carefully read the directions for each individual product for specific application instructions and warnings. For example you will want to place them about 3” away from the crown of the plant to ensure the fertilizer does not burn the roots or stem.

Feed Regularly
The amount of fertilizer you need and intervals at which you re-apply them will depend on which type you are using and variable factors such as average water temperatures and how many plants are in the pond. Applications can range from once a season to every 2-4 weeks. Whichever type or brand of fertilizer you use in your pond make sure it is low in or completely free of phosphates which can encourage algae growth.

Watch Them Grow
Fertilizing your plants will encourage increased growth and color in healthy plants to push them to perform at their best. Fertilizers will not be effective substitutes for gardening know how. If your plants are constantly dyeing make sure they are being planted in the right Temperature Zone and are being used in the correct applications. Bog Plants like Dwarf Cattails for example should not be entirely submerged in your pond, tropical plants like Antares should not be planted in cold climates and so on. This may also indicate that it may be time to divide your aquatic plants.

Do some homework, read the descriptions and text included with your plants and fertilizers to ensure you select the correct products for you unique water gardening scenario. Once your aquatic plants are established and growing, you can then decide if you need to fertilize to keep them blooming at their best.

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