Whereas Doreen Neville's the hot-house plant type-justthe opposite.

Its WeatherTRAK hardware and software products optimise irrigation schedules by taking into account soil type, landscape, and weather conditions, as well as plant type.

The plant types studied also cover a broad spectrum, from algae to trees.

Here are six plant types to grow at home.

Plant types include ferns, trees, grasses and crops, and provide essential food for all life on Earth.