Mechanical France has long been a pioneer in tidal energy. The Rance Tidal Power Station, operational since the 1960s, was one of the world's first large scale tidal power facilities. However, the Plant of the month club at Keeping It Green Caladiums are in! Fun colors to fill in your flower beds and decorative pots. Available in 4 inch pots for easy planting! How to Grow an Artichoke Plant: Edible and Beautiful Kramers Supreme Camellia in 4 inch pot *Cold and Heat Sensitive* Cannot Ship Out of the USA Asparagus Plants. How to Grow Asparagus for Spears.