Roses come in various heights, depending on the type, from low-growing landscape and shrub roses to taller hybrid teas and grandifloras. Gardeners are advised to consider these differences when choosing locations for planting.
During this week, gardeners should check soil moisture in areas that may not receive rainfall due to eaves or overhangs and provide additional water if necessary. The latter part of January is recommended for applying preemergent herbicide to lawns and garden beds to help control crabgrass and other early germinating weeds.
Pruning tasks include finishing the pruning of roses and deciduous fruit trees by the end of the month. At bud swell, it is suggested to spray deciduous fruit trees, almond trees, and roses with dormant oil as a measure against overwintering insects. Gardeners are also encouraged to prune out fire blight infections by removing affected shoots or branches at their origin.
Fertilization should be done for spring-flowering perennials, annuals, bulbs, and shrubs. If yellow foliage appears on plants—especially if seen in young leaves—it may indicate iron deficiency; yellowing in older leaves could suggest nitrogen deficiency.
For planting activities, grouping plants with similar water needs together is recommended. This period is suitable for moving perennials, shrubs, or small trees. As spring planting season starts next month, gardeners are encouraged to finalize their plans now.
Currently blooming annuals and perennials such as feverfew (Chrysanthemum parthenium), toadflax (Linaria maroccana), and cyclamen can be enjoyed in gardens. Citrus fruits are also plentiful during this time of year.
Gardeners are advised to leave frost-damaged growth on tender plants until the risk of frost has passed; pruning can begin once new growth emerges.
This guidance was prepared by UC Master Gardener Terry Lewis using information adapted from “A Gardener’s Companion for the Central San Joaquin Valley.” For those experiencing gardening issues, questions along with photos can be submitted to the Fresno County Master Gardeners Helpline.
