Can these metal planters stay outside in winter?

Most lead, cast iron, and galvanised vessels withstand frost and winter weather without issue. Ensure adequate drainage holes remain clear so expanding ice does not crack the metal. Heavier cast iron and lead pieces require no winter storage, though positioning them on pot feet helps prevent moisture trapping at the base.

How do I identify a lead planter?

Lead objects feel notably heavy for their size and exhibit a dull grey oxidised surface. The metal accepts a scratch easily with a fingernail and shows no signs of red iron rust. Older lead vessels frequently feature cast panel construction with soldered seams and subdued classical ornamentation.

How do I clean a cast iron urn?

Gentle washing with warm water and a soft brush removes loose soil and organic debris. Avoid harsh chemical cleaners that strip the historic grey patina. Applying a light coat of oil or wax can help protect exposed iron surfaces from further oxidation in damp garden environments.