Pieris japonica
Pieris japonica
Acid soil and rainwater rather than tap water — it will take sun only where the ground never dries out.
- Type
- Shrub · Perennial
- Botanical family
- Mixed / other
- Foliage color
- Green · Bronze, red and brown
- Flower color
- White
- Sunlight
- Partial shade is ideal; it takes sun only where the soil stays moist.
- Watering
- Keep it moist with rainwater, and never let it sit waterlogged.
- Feeding
- An ericaceous feed once flowering is done.
- Frost tolerant
- Yes
- Flowering
- April
- Pruning
- A light trim after flowering, taking the dead heads off with it.
- Mar–Apr Spring Growth
- Apr–Jul Flowering
- Jul–Dec Growing
- Jan–Mar Growing
- Plant spacing
- 4 ft 11 in
- In-row spacing
- 4 ft 11 in
- Between rows
- 6 ft 2 in
- Square-foot density
- Not suited to SFG
- Root system
- A fine surface mat, and nothing below it
- Working depth
- 4–12 in
- Can reach
- 18 in down where the soil allows
- Spread
- 5–7.5 ft across, about 1–1.5× the width of the plant
- Shallowest pot
- 16 in of soil
Hair-fine roots in a shallow felt, with no deep anchor to fall back on. It cannot chase water, so it is the first casualty of a drought and the first thing killed by a hoe. Mulch it, never cultivate around it, and never let it go dry in its first two summers.
The habit is Pieris japonica’s own; the figures are what that habit usually comes to at this size, not a measurement of this species. Roots follow the soil either way: a compacted pan, a high water table or heavy clay stops them well short of any of it, and deep open ground lets them go further.
- Cats and dogs
- Recorded toxic
Recorded as toxic to cats and dogs by ASPCA.
Exact species match, also filed as Andromeda Japonica and Lily-of-the-Valley Bush.
Beneficial predators that hunt this plant's pests — grow their favourite flowers nearby to recruit them. companion plant
- Assassin bug ReduviidaeHunts Lace bugs
A patient ambusher with a curved beak it drives into whatever it catches — caterpillars, beetles, bugs, and the occasional bee, so count it a generalist rather than a specialist. It will jab a careless finger too, so admire it and leave it be.
- Beneficial nematodes Steinernema & Heterorhabditis spp.Hunts Vine weevil
Microscopic worms watered onto damp soil that hunt down soil-dwelling grubs and release a bacterium that kills them within days. Timing is the whole thing: warm, damp soil and a small target grub, which means late summer for most of what they are used against.
- Frogs & toads AnuraHunts Vine weevil
A resident toad works the beds every night for slugs, cutworms, and weevils. Recruit them with water — even a sunken basin pond — plus damp shade and an upturned-pot toad house; skip the slug pellets that poison their prey.
- Green lacewing Chrysoperla carneaHunts Lace bugs
Its bristly larvae — "aphid lions" — impale aphids, mealybugs, thrips, and mite colonies, eating hundreds a week. Adults feed on nectar and pollen from small open flowers and overwinter in hollow stems left standing.
- Ground beetle CarabidaeHunts Vine weevil
Fast, glossy night hunters that patrol the soil surface for slugs, cutworms, and root-fly larvae. Give them daytime cover — thick perennial edges, stepping stones, a log — and skip the tillage that wrecks their burrows.
- Hedgehog Erinaceus europaeusHunts Vine weevil
A European animal, and worth saying so plainly: there are no hedgehogs in North America, and the ally that does the same night shift here is the toad, the opossum or the ground beetle. Where they do occur, cut a gap in the fence and skip the pellets.
- Minute pirate bug Orius spp.Hunts Lace bugs
A pinhead-sized true bug that is the best natural check on thrips, and happily spears aphids, mites, and insect eggs too. It needs pollen when prey is scarce, so keep something flowering nearby.
Rhododendron, Camellia, Azalea, Ferns
Green-leaved shrubs, like this one.
The Cottage Garden Companion — the gardener's herbarium at cottagegardencompanion.com