Watering and Feeding a Lady Banks' Rose (Banksia Rose): Go Easy on Fertilizer, Never Let a Pot Dry Out

Do not carry over your modern-rose routine

Modern roses are heavy feeders that need a year-round fertilizer plan and constant vigilance for black spot and powdery mildew; that routine is on the Rose page. Lady Banks' rose is a tough species rose: it wants little fertilizer and almost never needs spraying. Applying a modern-rose feeding schedule to it is the classic way to end up with a lush green plant and no flowers.

Day to day there are really only two things to manage: keep a potted plant from drying out, and do not overfeed. Get the after-bloom pruning and the fall tie-in on time, and the spring clusters come back every year.

Watering a container

Water a potted plant when the surface of the mix is dry, and water until it runs from the drainage holes. It dislikes constantly wet soil, so do not water again while the surface is still damp. With its heavy leaf load, a pot can dry out in a single summer day, so check it each morning. Drying out in summer heat drops the leaves and is the main reason potted plants decline.

1. Spring and fall: when the surface dries Water when the top of the mix looks pale and dry and the pot feels light. Every two or three days is typical, but let the soil, not the calendar, decide.
2. Summer: daily, morning or evening Water in the cool of the morning or evening until it drains through. In a west-facing spot the plant may wilt after midday, so check again toward evening.
3. Winter: sparingly A dormant plant uses little water. Wait two or three days after the surface dries, then water on a mild morning. Overwatering in winter damages roots.
4. Rinse the leaves to head off spider mites In a dry summer, spray the undersides of the leaves when you water. It keeps spider mites down and washes off dust.

Watering in the ground

Once established, an in-ground Lady Banks' rose basically needs no watering. It lives on rainfall; only soak it after ten days or more of heat and drought, or when it looks stressed and the soil is dry. The one exception is the first summer after planting, when a deep soak after any rainless week helps it root in.

1. First summer: about once a week Roots are still shallow, so in a dry week give the base a slow bucketful. A layer of compost or mulch slows drying.
2. Afterward: only in a real drought The signal is leaves that wilt at midday and have not recovered by morning. Otherwise leave it alone; roots go deeper and the plant is tougher for it.

Fertilizer: twice a year, a little

Lady Banks' rose blooms on less fertilizer than other roses and resents heavy feeding. Overfeed it and you get canes and leaves instead of flower buds. Feed just twice: once in late winter as the buds begin to move, and once after the post-bloom pruning in late spring. A small handful of slow-release granules at the base, or about half the label rate for a pot, is enough.

1. Late-winter feed Before growth starts, set slow-release granules a little away from the base. For a pot, follow the rim at about half the label rate.
2. After-bloom feed Give the same amount after the late-spring pruning to support the summer canes. That is the growth that carries next year's buds.
3. Nothing after midsummer Fertilizer from midsummer on pushes leafy growth on the very canes that should be setting buds in fall. Skip fall feeds and dormant feeds entirely.
4. Liquid feed only if needed, and dilute Only for a potted plant that looks weak, use a liquid fertilizer at half strength a few times in spring. A healthy plant does not need it.

Deadheading and care during bloom

Since it blooms once, there is no need to deadhead for repeat flowers as you would on a modern rose. During bloom, keep the water coming and snip spent clusters only if they bother you. When the show is over, the whole flowered shoot gets cut back as the after-bloom pruning rather than deadheaded flower by flower.

1. Never let it dry out while in flower The plant uses a lot of water during its spring flush. A pot dries faster than usual, so check the mix in the morning and water again in the evening if needed.
2. End of bloom is the pruning cue Once most of the clusters have dropped, skip picking off individual spent flowers and go straight to cutting flowered shoots back by half. Finish by midsummer.

A year of care at a glance

Here is the watering and feeding rhythm for a potted plant in a mild climate. There is less work than with a modern rose; what matters is getting the pruning and feeding timing right.