Excalibur The Best Plumeria Fertilizer

Excalibur - Only the Best Fertilizer for your Plumeria. 

Follow this link for all sizes offered: /excalibur/

Excalibur VI (6 month controlled release) /excalibur-6-month-plumeria-fertilizer/ 

Excalibur IX (9 month controlled release) /excalibur-9-plumeria-fertilizer/

Excalibur BOOST (2-3 month controlled release)  /excalibur-boost-plumeria-fertilizer-10-12-14-4-lbs/


After trying every fertilizer you can think of and searching for Fertilizers specifically formulated for Plumeria and not finding anything worth using, we decided we had to have a professional company help us develop a custom-mixed fertilizer. We knew from years of experience that Plumeria does best when you feed them a balanced fertilizer that provides nutrients as Plumeria need them. We believe that healthier plants will result in better growing habits and more blooms.
So to create the best possible fertilizer for Plumeria, we needed to have one formulated to our specifications just for Plumeria. The fertilizer had to have a balance of needed nutrients but also had to have a dependable slow release rate for the entire growing season. We wanted to market nationwide so we choose one of the largest fertilizer companies in the US. After many years of experimenting and research, we came up with a slow-released 11-11-13 that last 9 months and 11-11-14 that last 6 months, both with micronutrients. The release rate was formulated to release the nutrients as Plumeria needs them over the growing season. The formula is activated by moisture and heat by using the osmosis process. Releasing more when you water more, minimizes the release rate during dry months and dormancy. We also adjusted the release rate to accommodate the fact that most plumerias are growing in warm areas and receive additional water. 
Our latest release is Excalibur BOOST 10-12-14 with micronutrients is designed with the same high standards and releases over 2-3 months. It's water-soluble to provide nutrients quickly to help when transplanting or add an extra boost to seedlings, transplants, newly rooted and grafted plumeria.
Excalibur IX, Excalibur VI, and Excalibur BOOST is a Florida Colors Nursery exclusive custom-mixed fertilizer that's been formulated specifically for Plumeria. The ingredients are formulated to provide your plumeria with the nutrients it needs to thrive. The coatings use osmosis and have been formulated to release the nutrients as plumeria need them.
A controlled-release fertilizer designed to be used once and last 6 for Excalibur VI or 9 months for Excalibur XI. We produced two different fertilizers to match the different growing seasons. For example, Texas and Florida would use 9 months, and areas with shorter growing seasons would use 6 months.
Sold online in 4 lb bags, packaged in 4 lb., 8 lb., and 12 lb boxes.
Excalibur is approved for sale in the Continental US.

Typical Usage Rates:

  • 4-4 1/2" pot = 3/4 tablespoon.
  • 6" - 1 gal pot = 2 tablespoons.
  • 3 gal pot = 3 tablespoons.
  • 5 gal pot - 4 tablespoons.
  • In the ground 1 to 2 tablespoon per 1” trunk dia.


Excalibur is controlled to release moisture and heat-activated granular fertilizer using the osmosis process. It is applied dry and must be watered in. It helps improve efficiency by covering the granules with 1"-2" of soil. Granular fertilizers are easier to control because you can actually see how much fertilizer you're using and where it's being dispersed. The advantages of controlled release fertilizers are that the nutrients are available gradually over time. This means that the gardener can fertilize less often, and the nutrients are provided slowly and steadily.


Excalibur BOOST is a controlled release water-soluble fertilizer designed to release over 2-3 months. The advantage of water-soluble fertilizer is it releases quickly and you will start to see results within a few days.
Fertilizers are a mix of nitrogen (N), phosphorus (P), and potassium (K). The ratio will be indicated by three numbers (the first is nitrogen, the middle number is phosphorous, and the third is potassium). We recommend using a balanced fertilizer with micronutrients for plumeria.

Micronutrients - The Hidden Story...And, Often Only Delivered by Slow Release Fertilizers!

There are several nutrients essential to plant growth and health that are only needed in very small quantities. These are manganese, copper, iron, chlorine, and molybdenum, and zinc.
  • Chlorine is necessary for osmosis and ionic balance; it also plays a role in photosynthesis.
  • Copper is a component of some enzymes and of vitamin A. Symptoms of copper deficiency include browning of leaf tips and chlorosis.
  • Iron is essential for chlorophyll synthesis, which is why an iron deficiency results in chlorosis.
  • Manganese activates some important enzymes involved in chlorophyll formation. Manganese deficient plants will develop chlorosis between the veins of their leaves. The availability of manganese is partially dependent on soil PH.
  • Molybdenum is essential to plant health. Molybdenum is used by plants to reduce nitrates into usable forms. Some plants use it for nitrogen fixation, thus it may need to be added to some soils before seeding legumes.
  • Zinc participates in chlorophyll formation and also activates many enzymes. Symptoms of zinc deficiency include chlorosis and stunted growth.
Also see Bioblast, Vitazyme, Root Activator for a complete feeding program.

Follow this link for all sizes offered: https://floridacolorsplumeria/plumeria-fertilizer/

Excalibur VI (6 month controlled release) /excalibur-6-month-plumeria-fertilizer/ 

Excalibur IX (9 month controlled release) /excalibur-9-plumeria-fertilizer/

Excalibur BOOST (2-3 month controlled release)  /excalibur-boost-plumeria-fertilizer-10-12-14-4-lbs/