If golden creeping Jenny (Lysimachia nummularia "Aurea") lived up its other common name, gold moneywort, gardeners growing this plant could retire tomorrow. Its yellow, coin-shaped leaves and bright yellow, cup-shaped flowers spread stealthily through garden beds throughout the growing season and only falter where the ground is too dry to meet its needs. Suitable for U.S. Department of Agriculture plant hardiness zones 4 through 8, golden creeping Jenny needs little care, but performs best when growing in constantly moist soil and given a very light spring feed. Diseases rarely trouble golden creeping Jenny seriously, though gardeners can deal with patches of affected leaves to improve the plant's appearance.
Spread fine garden compost through golden creeping Jenny in early spring before growth starts. Rub the leaves gently with your fingertips to encourage the compost to fall through them and onto the ground. Water lightly to wash off any remaining compost.
Water during the growing season whenever the ground dries to a depth of more than 1 inch. Pull aside a few shoots and dig a small hole in the ground with the tip of a trowel to check, if you're unsure how dry it is.
Check leaves for signs of leaf spot or rust, such as dots, raised areas, pustules or patches in brown, yellow, orange, purple or black, and pick off affected leaves. Water plants only early in the morning so that leaves are dry by nightfall, for as long as the infection lasts.
Remove shoots growing into lawns and other inappropriate areas of the garden by cutting off loose shoots with pruning shears and digging up any rooted areas of shoot with a trowel. Remove as much root from the soil as possible.