If ideal growing conditions cannot be provided for chamomile, there are other plants that can be used as alternatives to grass lawns. Brief summaries of other options are listed below:
Thymus spp.
Suitable for free-draining soil in sunny areas. Scented leaves are reliably evergreen. Flowers are beneficial to pollinating insects. Deadhead to keep plants neat. Thymus serpyllum and cultivars of it, such as ‘Snowdrift’ and ‘Pink Chintz’, form an evergreen mat reaching about 5cm (2in) in height. T. pseudolanuginosus is also low growing. A mixture of species and cultivars creates an attractive tapestry effect.
Leptinella squalida
Leptinella squalida forms a close carpet of evergreen creeping stems. It can be grown in sun or light shade and prefers a moisture retentive soil. The foliage is soft, fern-like and bronze-green. Yellow buttons of flowers appear in summer. The cultivar ‘Platt's Black’ has dark purple leaves with green tips.
Acaena spp.
This vigorous creeping evergreen perennial is a useful grass substitute in sun or partial shade on well-drained soil. It forms a rather thick, 10cm (4in) high carpet and spreads rapidly by means of slender rooting stems. Depending on the species or cultivar, foliage can have tints of green, grey, purple or bronze. White flowers in summer are followed by red burrs. A selection of available species and cultivars can be find on the relevant RHS Find a Plant page.
Trifolium repens
Trifolium repens (small-leaved white clover) is a creeping perennial that roots at the nodes. Between May and October, on long stalks, it bears rounded heads of creamy white flowers that are a good source of nectar for bees. Tolerant of a wide range of soil types, although not suitable for very acidic or waterlogged soils. White clover is drought tolerant and root nodules produce nitrogen, keeping it green even in hot, dry summers. It performs best in full sun. Clover can be introduced to an established grass lawn by over-sowing in spring, using a dwarf agricultural cultivar or strain, such as ‘Kent Wild White’.
Ophiopogon japonicus ‘Minor’
Referred to as mondo grass, although not an actual grass, Ophiopogon japonicus ‘Minor’ is an evergreen perennial reaching about 10cm in height. It will slowly form dense colonies and once established requires very little maintenance. Suitable for sun or partial shade.