Gaura

Main pruning is done early in spring (March/April), removing the entire dry above-ground part about 5–10 cm above the ground.

Summer pruning: If the plant seems to stop blooming in summer or is too leggy, you can cut it back by one-third in mid-summer. This encourages the clump to thicken and triggers a new wave of flowering that lasts until frost.

Gaura is frost-hardy in our conditions down to roughly -17 °C to -23 °C (zone 6), but its biggest enemy is not frost, but winter dampness.

• Protection: Do not cut the plant in autumn; the dry stems protect the heart of the plant.
• Covering: Cover the base of the plant with evergreen branches or dry leaves for winter to prevent water from reaching the crown.
• Spring: Cut back the dry parts only in spring, close to the ground.

Once established, Gaura is very drought-tolerant.

• After planting: Water regularly for the first few weeks so the seedling roots well.
• Mature plant: Water only during prolonged drought. Excessive watering harms it more than drought – it causes stems to stretch and reduces flower production.

Gaura is very modest in this regard. Excessive fertilizing is actually harmful. If it gets too many nutrients (especially nitrogen), it will produce lots of leaves and long stems that will flop over, but it will flower very little. Just adding a bit of compost in spring is enough. If you have very poor soil, use a fertilizer for flowering perennials with low nitrogen content.

Gaura is classified more as a short-lived perennial. It usually lasts in full vigor for 3 to 4 years on one site. After that, it may start to weaken or freeze out over winter. However, it often self-seeds on the site, raising a replacement for itself (if you let the seeds ripen).

Stem flopping is usually caused by three factors:

1. Too little sun: The plant stretches towards the light.
2. Too much water or fertilizer: Stems become soft and cannot support the weight of the flowers.
3. Dense planting: Gaura needs space around it.

If it flops, you can stake it with an inconspicuous support (bamboo sticks with twine) or plant it among sturdier perennials or grasses that it can lean on.

Gaura is also wonderful in cut bouquets, adding volume and lightness. Harvest the stems as soon as the first two to three florets open. Other buds will gradually open in the vase. Cut them best early in the morning when the stems are full of water, and place them in water immediately.

Yes, Gaura can be grown in containers, but you must respect its root system. Because it forms a long taproot, it needs a deeper pot (not a shallow planter box). Good drainage at the bottom and permeable substrate are important. In a container, it will require more frequent watering than in a bed, but the substrate must dry out between waterings.

Propagation by division is difficult and often unsuccessful for Gaura due to its long taproot, which does not divide or regenerate well. Better methods are:

• Cuttings: Taking basal cuttings in spring or summer.
• Sowing: The plant reproduces easily from seeds (it often self-seeds).

Thanks to its airiness, Gaura fits perfectly into modern prairie plantings. It looks beautiful with:

• Grasses: Feather grass (Stipa), silvergrass (Miscanthus), or fountain grass (Pennisetum).
• Perennials: Purpletop vervain (Verbena bonariensis), Coneflower (Echinacea), Sage (Salvia), or Catmint (Nepeta).
• Roses: It adds lightness to rose beds and fills the space between bushes.

It is a relatively resilient plant. Regarding diseases, it most often suffers from root rot (due to waterlogging). Regarding pests, aphids may appear on young shoots, which can be washed off with a stream of water or treated with a soap solution. Occasionally, rust or mildew may occur if the plant is in a dense planting without air circulation.

Good news for pet owners – Gaura (Gaura lindheimeri) is not considered toxic to dogs, cats, or horses. It is a safe plant for gardens where animals roam.

Gaura is a sun lover. For abundant flowering and strong stems, it needs:

• Full sun: In shade, it will flower poorly and stretch unattractively.
• Permeable soil: This is absolutely key. The soil must be sandy-loam or sandy, well-drained. In heavy clay soil, its roots will rot in winter.
• Warmth: It prefers warm spots, for example, near south-facing walls.