Lantana is a vibrant plant known for its continuous, colorful blooms. While hardy, proper fertilization maximizes its flowering potential and supports overall plant vigor. Understanding lantana’s specific nutritional needs helps achieve an impressive display of blossoms throughout its growing season.
Lantana’s Nutritional Requirements
Plants require a balance of macronutrients—nitrogen (N), phosphorus (P), and potassium (K)—for healthy growth. Nitrogen supports lush foliage and robust stems. Potassium aids in overall plant function, including water uptake and disease resistance. For flowering plants like lantana, phosphorus encourages abundant bloom production and strong root development.
An appropriate NPK ratio for blooming plants often features higher phosphorus. Lantana can also thrive with a balanced fertilizer like 10-10-10 or 20-20-20, especially for in-ground plants. However, to enhance flowering, a formula with more phosphorus relative to nitrogen is beneficial.
Selecting the Best Lantana Fertilizer
When choosing a fertilizer for lantana, several types are available. Granular fertilizers are slow-release, providing nutrients over an extended period, making them convenient for in-ground plants as they require less frequent application. Liquid or water-soluble fertilizers offer immediate nutrient availability, suitable for quick boosts, especially for container-grown lantana which deplete nutrients more rapidly.
For optimal bloom production, specific NPK ratios are recommended. While a balanced 10-10-10 or 20-20-20 NPK formula works for general growth, fertilizers with a higher middle number (more phosphorus) encourage prolific flowering. For container plants, a balanced 20-20-20 fertilizer applied monthly can be effective. Always refer to the product label for specific application rates and instructions.
Fertilization Schedule and Application
The timing and method of fertilizer application are important for lantana’s health and bloom production. For in-ground lantana, a single application of general fertilizer in early spring is often sufficient. A second light application in mid-summer may be needed if new growth emerges. Heavy fertilization is not necessary, as too much fertilizer can reduce flowering.
Container-grown lantana require more frequent fertilization because nutrients leach from the potting mix quickly. Incorporate a slow-release granular fertilizer into the soil at planting, supplemented with a water-soluble liquid fertilizer once a month during the growing season. When applying granular fertilizer, sprinkle pellets away from plant stems and water thoroughly to dissolve nutrients and prevent root burn. For liquid fertilizers, dilute according to package instructions and apply to moist soil, never dry roots, to prevent damage. Cease fertilization two months before the first expected frost to avoid stimulating new growth vulnerable to cold.
Common Fertilization Mistakes and Tips
Over-fertilization negatively impacts lantana, often leading to lush foliage at the expense of flower production. Signs include yellowing or wilting leaves, browning leaf margins, stunted growth, and a lack of blooms. Excessive fertilizer can also cause “fertilizer burn,” where roots dry out and become ineffective. If over-fertilization occurs, thoroughly water the plant to leach out excess nutrients.
To avoid these issues, fertilize lightly and observe the plant’s response. For in-ground lantana, if the soil is rich, fertilization may not be necessary. Organic options like compost improve soil health, though their nutrient levels vary. For container-grown lantana, which are more susceptible to nutrient depletion, regular but lighter feedings are preferred. Always prioritize proper watering, as consistent moisture helps the plant absorb nutrients and prevents fertilizer-related damage.