How to grow plantain lilies in pots and shady borders

Plantain lilies (hostas) earn their keep where many plants sulk – in cool, shady corners and on sheltered patios. If your shady border looks bare, or the pot by the back door is all leaf and no shape, hostas are usually the answer.

Getting the light, soil and pots right

Hostas are shade lovers, but not complete darkness lovers. Aim for dappled shade or morning sun with afternoon shade. A bright east-facing side return, under a small tree, or the shadier side of a patio all work well. Full hot midday sun often scorches the leaves, especially on variegated varieties.

For borders, improve the soil before planting. Dig in plenty of garden compost or well-rotted manure so it holds moisture but still drains. Heavy clay benefits from added grit; very light sandy soil needs more organic matter.

In pots, hostas do best in:

• A wide, fairly deep container (at least 25–30 cm across)
• Good drainage holes
• Peat‑free multipurpose compost mixed with a bit of garden soil for weight

If you lift the pot and it still feels heavy the day after watering, wait. Hostas like moisture, but sitting in soggy compost leads to weak growth and slug damage.

Plant crowns with the buds just below the surface, not buried deeply and not sitting proud. Firm gently and water well once, letting excess drain away.

Watering, feeding and simple care

Hostas are thirsty in active growth, especially in pots. Check with a finger: if the top 3–4 cm of compost is dry and the pot feels noticeably lighter, water thoroughly until it runs from the drainage holes, then empty any saucer.

In a border, water new plants regularly in their first season, particularly in a dry spell. Once established in decent soil, they usually cope with normal British summers with only occasional extra watering.

Feed potted hostas from spring to mid-summer with a balanced liquid fertiliser about once a month, following the label. In borders, a spring mulch of compost around (not over) the crowns often gives enough nutrition.

Remove any yellowing or slug-shredded leaves during the season to keep plants tidy and encourage fresh growth. After the first frosts, foliage will collapse; cut it back to a few centimetres above the soil to reduce hiding places for slugs.

Slugs, snails and keeping leaves looking good

If your lovely new leaves look like lace overnight, you are not alone. Hostas are slug favourites, especially the soft, lush kinds.

Combine a few methods rather than relying on one:

• Physical barriers: copper tape on pot rims, or pots on feet so slugs have further to climb.
• Hand removal: check in the evening or after rain; you often find them under rims or nearby stones.
• Traps and decoys: boards or upturned pots as “slug hotels” you can clear each morning.
• Plant choice: thicker-leaved types (often blue or heavily ribbed) tend to suffer less.

Avoid piling mulch right up to the stems, as this creates a perfect slug hide. If leaves look worse after every ‘fix’, stop changing several things at once; watch for a week to see which method is actually helping.

For borders, group hostas with ferns, astrantia or heucheras for a full, layered look that shades the soil and helps keep moisture in.

Once you have one good clump or a thriving pot, you can divide hostas in early spring as the noses just appear, replanting pieces to fill other shady gaps.

Start with one sturdy plant and a decent-sized pot or a well-prepared patch of soil, and you will quickly see how much calmer and greener a shady corner can look.