How to train ivy and climbing plants on a wall without damaging the plant

A Practical Guide by Deco Garden

A good trellis doesn't make a plant climb on its own. First, identify how the plant attaches itself, then choose the right support, distance from the wall, and ties that won't strangle the stem. This is how you achieve neat coverage that is also easy to maintain.

First, check how the plant attaches

Climbing plants have different methods of attachment. The support must be suited to the method, the weight of the mature plant, and the surface it is being installed on.

Measurements to keep in mind

• From wall to support: The RHS recommends keeping supports about 5 cm away from the wall or fence to allow for free growth. On wood or plaster, professional sources from the University of Illinois recommend a larger gap of about 10–15 cm to improve ventilation and allow for maintenance.
• Between support wires: In a wire system, a spacing of about 30–45 cm is a standard starting point. Adjust based on leaf size, internode length, and plant weight.
• From wall to plant: When planting in front of a solid wall, usually leave about 30–45 cm for the plant's base. This gives the roots space and helps the plant receive rainfall in areas located outside the wall's "rain shadow."

Before drilling or attaching

Check the wall material, locate electrical and water lines, and determine the expected weight of the plant when wet and mature. Use anchors and fasteners appropriate for the surface. For wood siding, delicate plaster, or old walls, consult an installer; plastic netting is not a substitute for a sturdy frame.

Installation and training — step by step

1. Plan the coverage: Measure width and height, leave access for windows, gutters, shutters, and maintenance points, and choose a support suited to the mature weight.
2. Set up the frame: Stretch the netting between posts or on fasteners spaced away from the wall. Stretch it evenly, without distorting the mesh and without relying on the plant branches as anchors.
3. Spread the branches: Arrange several main stems in a fan shape. Do not pull stiff stems at a sharp angle and do not forcefully detach existing growth.
4. Tie softly: For the stem, use soft twine or wide plant ties in a loose figure-eight shape between the stem and the support. Metal wire, even if coated, is better suited for securing the net to the frame rather than for a tight loop around a stem.
5. Re-check: Every few weeks during the growing season, check that the ties are not constricting, guide new growth, and prune branches advancing toward windows, gutters, or under siding.

A proper support kit

The TRELLINET netting in our store is made of extruded polypropylene, is UV-treated, and features 20 × 20 cm openings according to the manufacturer. It is particularly suitable for guiding beans, peas, cucumbers, and young climbers that grasp their support. For true ivy, use it as a frame and guide the stems with soft ties.

Frequently asked questions

Does ivy require a net?

No. True ivy can adhere to a rough surface using its adhesive roots. A net is useful when you want to keep the plant away from the wall, guide it along a specific path, or maintain the ability to service the surface.

Can a net be attached directly to the wall?

It is better to leave a gap that allows the plant to grow behind it and lets air in. On a solid wall, a standard starting point is about 5 cm; on wood or sensitive plaster, a larger gap and professional installation are advised.

Why is the stem damaged near the tie?

A narrow or tight tie may press against a thickening stem. Switch to softer, wider twine, allow for freedom of movement, and check the ties regularly. Do not attempt to "fix" a split stem by tightening it further.

Is 20 × 20 cm netting suitable for all climbers?

No. It is suitable for plants capable of reaching the openings or those that can be gently guided toward them. A very delicate climber might prefer tighter support, and a heavy or woody climber requires a frame designed for its weight.

Ready to measure the wall?

Measure the width and height, check the surface type, and choose the net width. If the plant is already large and heavy, plan a suitable frame first.

Choose support netting