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Lead mine spoil heaps often support a rare type of grassland dominated by spring sandwort and sheep's fescue.

A little white clover or sweet vernal grass or sheep’s fescue may be added, if you fancy them, but they will not improve the appearance of the lawn.

Thus in the dry sandy soil you may find broom, spurrey, sheep's fescue, pine trees, all with narrow leaves; whilst on the moister soil you may find burdock, primroses, cocksfoot and other broad-leaved plants.

On the road sides you see broom, heather, heath, harebells, along with gorse and bracken with milkwort nestling underneath: crested dog's tail and sheep's fescue are common grasses, while spurrey, knotwood, corn marigold, are a few of the numerous weeds in the arable fields.

The test tube experiment should now be made with a narrow-leaved grass like sheep's fescue and with a wide-leaved grass like cocksfoot.