Simplicity is a recurring theme among wax begonia, Begonia X semperflorens–cultorum. Floral color is white, pink or red. Foliar color is green, bronze or dark bronze. Each floral color combines with each foliar color. Variation within this simple color range is minimal. So is variation of foliar or floral form. Cultivars with slightly fluffier double bloom are rare.

Perfection eliminated the potential for improvement. Regardless of such simple variation, wax begonia is among the most popular annuals. Technically, it is perennial. Technically, it prefers warm weather. It remains available as cool season color after summer because it blooms until frost. Later, it can recover from minor frost. Without frost, it blooms all year.

Mature wax begonia rarely grows higher or wider than a foot, with densely rounded form. Flowers are small but abundant. Both leaves and stems are succulent and tender, with a waxy sheen. Propagation is remarkably easy by cuttings or division. Consistent watering is very important. Partial shade is tolerable, but if too shady, can inhibit bloom somewhat.

My neighbor describes sweet alyssum, Lobularia maritima, as a ‘polite’ weed. It naturalized over an area of her vegetable garden that was not in use at the time, but was easy to get rid of when the space was needed for something else. A few plants that were left in the perimeter bloom almost continuously and fill in other unused space between herbs and perennials without interfering with them.

As a bedding planting, sweet alyssum is most often planted from cell packs like most other annuals. Yet, seed is so easy to sow in bare spots among mixed annuals or perennials. Naturalized sweet alysssum sows seed so abundantly that new plants replace old plants before the old plants deteriorate.

Bloom is most often white, but can be shades of pink or purple. However, naturalized sweet alyssum eventually reverts to classic white. The minute, sweetly fragrant flowers form small, round clusters over the delicate mounds of finely textured and sometimes sparse foliage. The tiny leaves are only about an inch long and quite narrow. The largest naturalized plants are not often more than a foot tall.

Like several annual warm season bedding plants, oxeye daisy, Leucanthemum vulgare, is actually perennial. Also, some of the less extensively bred sorts disperse enough seed to naturalize and potentially become invasive. Increasingly popular modern varieties that are prudent with seed might not be true to type. Some might revert to more prolific forms.

Modern varieties should not get much higher than a foot and a half. They should also be more dense than the simple species, which gets a few feet tall. Foliage and form is quite variable among varieties. Stems are solitary or branched. They may be leafy or sparsely foliated above basal rosettes. Leaves might be lobed or serrate, with or without petioles.

The solitary, paired or tripled composite blooms of oxeye daisy are not so variable. They are classic daisies, with a dozen to three dozen clear white ray florets surrounding bright yellow disc florets. Without deadheading, fresh new bloom overwhelms deteriorating old bloom. Oxeye daisy is splendid as a cut flower. Spring bloom continues through summer, and can actually continue sporadically for as long as the weather is warm.