Shade is a light condition, not a planting plan

Observe light across a useful day

Record when direct rays reach the planting area, whether shade is cast by a building or leaves, and whether it changes as trees leaf out. A short sun interval near midday differs from the same duration of low evening light. Note bright open shade separately from a dark enclosed corner.

Use observations from more than one season where possible. A winter photograph beneath a deciduous tree can seriously overstate summer light. Do not remove a valuable tree merely to match a sunny inspiration image; first consider a different planting purpose.

Follow the water, then the roots

After ordinary rain and again during a dry spell, inspect the root-zone conditions where it is safe to do so. A wall or tree canopy can shed rain away from soil. Existing roots may compete for moisture even when the surface looks cool. Persistent standing water is a separate issue from a moist, crumbly soil.

Do not sever established tree roots, raise soil over them or excavate a new bed as a default fix. Have proposed work near important trees assessed. Where root disturbance is unacceptable, leave the root zone intact and use a different garden area or an appropriately located movable feature.

Choose between three different outcomes

Moist, draining part shade: use the 4 × 2 m fern and foamflower border. Its 4 ferns and 8 foamflowers have explicit adult space. Check the slightly acidic conditions and local hardiness before adopting it.

Drier shade after establishment: the 6 × 2 m fern and bergenia example uses a smaller, tougher foliage palette, with establishment watering still required. Its dry tolerance is not permission to place it into an unplantable root mat.

Very dark or persistently saturated ground: neither example is an automatic match. Use existing suitable vegetation, investigate drainage, or choose a non-planted focal point placed without harming roots. A clear rejection is more useful than a replacement plant that shares the same limitation.

A worked courtyard diagnosis

Imagine a 6 × 4 m courtyard with a shaded far border and a dry strip against the left wall. The first sketch assigns 9 m² to one moisture-loving mix. Observations after rain show that the two strips behave differently. The decision is to retain the 6 m² far border for the moist palette and redesign the 3 m² side strip separately, rather than watering all 9 m² on one schedule.

In the courtyard drawing, label each bed with its actual condition. Remove plant circles from the unsuitable strip and recalculate the list. Keep a note that the modified palette needs a new spacing check; the original 13-plant list no longer describes the revised plan.

Read the first season as feedback

Check new root balls as well as surrounding soil. Watch for wilt, scorch, weak stretched growth and failure to establish, but do not diagnose solely from one symptom. Record which position fails and whether the soil is dry or saturated at that time. Review drainage and light before adding fertilizer.

Use foliage as a deliberate season-long role, with spring flowers as a bonus. Leave early gaps for adult growth. If every gap must look filled immediately, a temporary, separately maintained container display may be more honest than overcrowding the permanent bed. Save the observed light and moisture pattern in the site brief.