What's the best way to season new cast iron outdoor planters?
Seasoning new cast iron outdoor planters is essential to prevent rust and ensure longevity. Here’s the best method:
1. Clean Thoroughly: Wash the planter with warm, soapy water to remove factory residues. Dry completely.
2. Apply Oil: Coat the entire surface (inside and out) with a thin layer of food-grade flaxseed oil or mineral oil. Avoid vegetable oils, as they can turn rancid.
3. Bake or Heat: Place the planter in an oven at 375°F (190°C) for an hour, or use a heat gun outdoors to polymerize the oil, creating a protective layer.
4. Repeat: Apply 2-3 more layers for optimal protection, reheating each time.
This process seals the iron, preventing moisture damage and rust. Re-season annually for maintained durability.
