The Plumeria Fertilizer and Nutrition Guide offers comprehensive advice on how to properly feed plumeria to achieve optimal growth and vibrant blooms. This guide covers the critical aspects of plumeria nutrition, including how to select the right fertilizers based on your plant’s specific needs, balance essential nutrients like nitrogen, phosphorus, and potassium, and manage soil pH to enhance nutrient uptake. It also explores the use of supplements and soil additives to support sustained health and vitality, ensuring your plumeria remains strong and healthy throughout the year. Whether you’re aiming to boost growth during the active season or enhance blooming, this guide provides the essential information to tailor your fertilization practices for the best results.
Excalibur Fertilizer Breakdown – What’s in It and How It Works for Plumeria
Excalibur Fertilizer Breakdown – What’s in It and How It Works for Plumeria
Excalibur is a slow-release fertilizer developed specifically for plumeria. Unlike general-purpose products, it’s formulated to match the nutrient needs, bloom timing, and environmental conditions typical in plumeria cultivation, especially in containers or hot, dry climates.
This article gives a full breakdown of its formulation, versions, and why it performs so reliably for tropical growers.
🔬 Nutrient Composition
| Nutrient | Role in Plumeria |
|---|---|
| Nitrogen (N) | Leaf, stem, and canopy development |
| Phosphorus (P) | Root strength and flower production |
| Potassium (K) | Stem strength, bloom quality, disease resistance |
Standard NPK Ratios:
- Excalibur IX: 11‑11‑13
- Excalibur VI: 11‑11‑14
- Excalibur Boost: 10‑12‑14
These formulas offer balanced feeding for steady growth, with enough phosphorus to support flowering, but without excess that causes micronutrient lockout.
Chelated Micronutrients Included
Excalibur includes a full suite of chelated trace elements for maximum uptake in containers and alkaline soil:
- Iron (Fe) – Prevents chlorosis and yellow leaves
- Zinc (Zn) – Bud and leaf development
- Manganese (Mn) – Chlorophyll and enzyme function
- Copper (Cu) – Helps flowering and metabolic activity
- Molybdenum (Mo) – Supports nitrogen conversion
- Boron (B) – Essential for flowering and tissue growth
Chelated forms (e.g., EDTA, DTPA) ensure these stay soluble even in high-pH mixes.
Release Mechanism: Osmosis-Based Technology
Unlike polymer-coated fertilizers (like Osmocote), Excalibur uses a multi-layer moisture-reactive coating that releases nutrients through osmosis, not temperature. This allows:
- Root-triggered feeding based on plant water uptake
- More consistent release in hot climates and containers
- Lower risk of nutrient dump during heat waves or dry-downs
This system is tested at 85°F and Florida-style rainfall conditions, meaning the published release duration (6–9 months) reflects real-world usage, not idealized lab conditions.
Versions of Excalibur
| Product | Duration | Best Use |
|---|---|---|
| Excalibur VI | ~6 months | Mid-season feed, cool zones, small containers |
| Excalibur IX | ~9 months | Full-season base feed (most common) |
| Excalibur Boost | ~2–3 months | Bloom-stage boost, transplant recovery |
Boost is faster-acting, while VI and IX provide gradual, reliable support from spring to fall.
Application Guide
| Pot Size | Recommended Dose |
|---|---|
| 1–3 gal | 1–2 tablespoons |
| 5–7 gal | 2–3 tablespoons |
| 10–15 gal | ¼ cup |
| 20+ gal or ground | ⅓–½ cup |
- Apply around the dripline—not against the trunk
- Water in thoroughly after application
- Use once per season for IX; every 6 months for VI; every 6–10 weeks for Boost
✅ Benefits for Plumeria Growers
| Benefit | Why It Matters |
|---|---|
| Chelated micros included | No need for separate iron or zinc feed |
| Long-lasting but gentle | Reduces burn risk and salt buildup |
| Climate-tested release curve | Works well in hot, container environments |
| One-and-done application | Saves time, especially in large collections |
Final Takeaway
Excalibur’s balanced formula, moisture-driven release, and full-spectrum micronutrient profile make it one of the most plumeria-specific fertilizers on the market. It takes the guesswork out of feeding and performs consistently across seasons.