Plumeria seedlings can grow lanky due to several factors:

1. Insufficient Light:
   • Plumerias require ample sunlight to grow robustly. Inadequate light causes them to stretch towards the light source, resulting in tall, thin, and leggy growth.
2. Overcrowding:
   • When seedlings are planted too closely together, they compete for light and space, leading to elongated growth as they strive to outgrow each other.
3. High Temperatures:
   • Excessive heat, especially in combination with low light, can cause plumeria seedlings to grow tall and spindly.
4. Nutrient Imbalance:
   • Over-fertilizing, particularly with high nitrogen fertilizers, can promote rapid, weak growth. A balanced nutrient supply is crucial for healthy development.
5. Watering Practices:
   • Overwatering or inconsistent watering can stress seedlings, contributing to uneven and lanky growth. Plumerias prefer well-draining soil and should be watered appropriately.
6. Genetic Factors:
   • Some plumeria varieties naturally have a more lanky growth habit, especially in their early stages.

Tips to Prevent Lanky Growth:

• Provide adequate light, ideally full sun, for most of the day.
• Ensure proper spacing between seedlings to reduce competition.
• Maintain moderate temperatures and avoid extreme heat.
• Use a balanced fertilizer and avoid excessive nitrogen.
• Follow a consistent watering schedule and ensure good drainage.
• Pinch back or prune seedlings to encourage bushier growth.