Silver shamrock (Oxalis adenophylla)

Name: Silver shamrock (Oxalis adenophylla)
Brand: Van Noort
SKU: VAN-146-650-01
Price: 6.49 CAD
Availability: InStock

Sale Sold out

Silver shamrock: pink flowers with light centres above small divided leaves.

Hardy summer-flowering tuber Oxalidaceae

Compact perennial for rock gardens and containers

Van Noort

Common nameSilver shamrock, Chilean oxalis

FamilyOxalidaceae

GenusOxalis

Speciesadenophylla

Bulb typeHardy summer-flowering tuber

Botanical nameOxalis adenophylla

Quantity per pack5 size 6/7 tubers

Silver shamrock (Oxalis adenophylla) forms a compact cushion of grey-green leaves divided into numerous fan-shaped leaflets. In summer, soft-pink funnel-shaped flowers, marked with darker pink veins and a pale centre, rise just above the foliage. The Van Noort package contains five size 6/7 tubers. Plants reach approximately 10 cm (4 in) and suit rock gardens, low borders, stone walls, and containers. Hardy in Zone 4, this species appreciates cool summers and impeccable drainage, especially during cold, wet periods. Its distinctive foliage remains ornamental even before flowers begin opening and gives small spaces a finely textured accent.

Plant the tubers in fall, 5 cm (2 in) deep and approximately 10 cm (4 in) apart, in light, gritty, or sandy soil. Choose full sun or bright partial shade and avoid depressions where rainwater or snowmelt collects. Water after planting, then maintain gentle moisture during growth without saturating the soil. A modest amount of mature compost is sufficient; nitrogen-rich feeding makes foliage softer. In containers, use a porous mix and protect the pot from roof runoff during winter. Mark the planting position so dormant tubers are not disturbed while foliage is absent.

Allow foliage to complete its cycle naturally and reduce irrigation as dormancy begins. In a freely drained rock garden, silver shamrock can remain in place and gradually form a broader clump. Pair it with crocuses, dwarf irises, sedums, saxifrages, or small grasses that will not overwhelm its low habit. Flowers may receive visiting pollinating insects. Every plant part contains oxalic acid and is not intended for consumption, so keep tubers and foliage away from children and pets. Wear gloves if your skin is sensitive while planting or dividing. Avoid moving tubers while they are actively growing unless drainage problems require immediate correction.

In the garden

Exposure: Full sun to partial shade
Hardiness: Zone 4

Planting guide

Planting & establishment

Spacing / density

10 cm (4 in) between tubers

Planting period

Fall, before the ground freezes

Propagation

Division of tubers during dormancy

Growing method

Plant all five silver shamrock tubers in fall after the soil has cooled and before it freezes. Choose full sun or bright partial shade and light, gritty, or sandy soil that drains rapidly. Loosen the entire area approximately 15 to 20 cm (6 to 8 in) deep, then add a modest amount of mature compost only when soil is poor. Set each tuber 5 cm (2 in) deep and approximately 10 cm (4 in) from the next. Group the package to form a visible cushion. Cover, firm gently, and water deeply once. In spring and summer, provide light moisture when rainfall is insufficient without saturating the root zone. Avoid nitrogen-rich fertilizer and thick mulch that holds moisture. Allow foliage to complete its cycle naturally, then reduce irrigation during dormancy. Mark the location before leaves disappear. Where winters are very wet, use a raised bed or a container sheltered from roof runoff. Divide crowded clumps while dormant and replant firm tubers promptly. Wear gloves if your skin is sensitive and keep the package away from children and pets. When spring returns, remove winter protection gradually and watch for new leaves without digging through the planting area. Keep the surface free of dense, moisture-holding debris.

Soil and care

Soil & care

Soil pH

Slightly acidic to neutral

Moisture

Light moisture during growth; drier in dormancy

Care level

Easy

Watering

Water deeply after fall planting to settle the soil. During spring growth and summer flowering, check moisture before each application and water only when the surface begins to dry. Soil may remain lightly moist but never saturated. Reduce irrigation gradually as foliage declines and keep the site comparatively dry during dormancy. In containers, always empty saucers after rain and keep drainage holes open. Avoid frequent shallow watering, which encourages moisture near the crown without wetting the full root zone evenly.

Soil type

Silver shamrock prefers light, gritty, sandy, perfectly drained soil. Rock-garden mix or loam amended with fine gravel works well. In heavy clay, use a raised bed rather than a small gravel pocket. Avoid depressions where rainwater or snowmelt collects and thick, wet mulch. Gentle moisture supports growth, but tubers tolerate winter saturation poorly. A slightly acidic to neutral pH is generally suitable. In containers, mineral drainage material helps keep air around the roots during prolonged rain.

Fertilization

Add a modest amount of mature compost while preparing poor soil. At the beginning of growth, a balanced slow-release fertilizer may be applied at the label rate, although a vigorous plant needs very little feeding. Avoid fresh manure and nitrogen-rich formulas, which make foliage soft. Stop feeding after bloom and let the plant enter dormancy naturally. Never place concentrated fertilizer directly against tubers. Where foliage remains compact and well coloured, compost alone is usually sufficient.

Seasonal care

In early spring, remove moisture-holding debris carefully without damaging new leaves. Check drainage after snowmelt and correct depressions where water remains. Water only when soil begins to dry. A thin layer of mature compost may support poor soil, but avoid fresh manure and nitrogen-rich feeding. During growth, keep stones and neighbouring plants far enough away to preserve air circulation around the clump. Watch for slugs, aphids, and unusual spotting without applying unnecessary treatment. In summer, enjoy the pink flowers and leave them accessible to pollinating insects. Remove faded flowers if you want to limit seedlings, but retain all foliage until natural dormancy. Reduce irrigation afterward and mark the position before leaves disappear. Avoid digging deeply around the tubers. In fall, confirm that soil remains loose and sharply drained. A crowded clump may be lifted during dormancy, divided, and replanted immediately. Discard soft or damaged tubers. Where winters are wet, protect the group from runoff or use a raised bed. In containers, keep drainage holes open, avoid full saucers, and insulate the walls during extreme cold. Do not move a chilled pot into a heated room, where premature growth can weaken the following display. Keep plant labels visible through dormancy so the resting tubers are not accidentally disturbed. After prolonged rain, inspect containers and low garden areas before adding water. Clean division tools and avoid moving an actively growing tuber unless an urgent drainage problem requires correction.

Container growing

Recommended pot size

Container at least 20 cm (8 in) deep

Choose a stable container at least 20 cm (8 in) deep with several open drainage holes. Fill it with porous potting mix containing a generous proportion of perlite, pumice, or fine gravel. Plant all five tubers 5 cm (2 in) deep and approximately 8 to 10 cm (3 to 4 in) apart. Water thoroughly and let every excess drain. Place the pot in sun or bright partial shade, sheltered from roof runoff. In spring and summer, check moisture below the surface before watering; the mix may remain lightly moist but never saturated. A small amount of balanced fertilizer is sufficient when growth appears pale. Rotate the container if foliage leans toward the light. After flowering, let leaves complete their cycle in a bright position, then reduce irrigation during dormancy. In very cold locations, insulate the walls or place the pot in a sheltered, unheated outdoor position. Divide a crowded clump while dormant, refresh part of the mix, and replant only firm tubers. Keep a visible label and empty the saucer after every rain. Space neighbouring pots to maintain air circulation around the low cushion. A very thin decorative gravel layer can reduce soil splash without blocking evaporation.

Size, flowering & harvest

Mature height

10 cm (4 in)

Width / spread

15 to 20 cm (6 to 8 in)

Flower color

Soft pink with darker pink veins

Foliage color

Silvery grey-green

Foliage type

Palmate, fan-shaped foliage

Growth rate

Moderate

Growth habit

Compact, spreading cushion

Bloom period

Silver shamrock produces small, soft-pink funnel-shaped summer flowers with darker veins and pale centres. They rise just above a grey-green cushion approximately 10 cm (4 in) tall. Full sun or bright partial shade, gentle moisture, and very fast drainage support an even display. Corollas may close during cloudy weather. Allow the foliage to complete its cycle before reducing irrigation. Visiting insects may use the flowers when conditions are warm and bright.

Garden associations

Companion plants & uses

Companion plants

Pair silver shamrock with crocuses, dwarf irises, saxifrages, small sedums, alpine pinks, low bellflowers, or compact grasses. These plants provide complementary forms and share a preference for sun, gentle moisture, and sharply drained soil. Choose neighbours that will not cover the 10 cm (4 in) cushion and whose roots remain easy to separate. Avoid aggressive groundcovers, species requiring constant moisture, and tall plants that create excessive shade. Leave sufficient space for air circulation and future division. Pale stones and silver foliage can repeat its colouring without competing with the pink flowers.

Garden use

Plant all five silver shamrock tubers as one group in a rock garden, at the front of a border, or in a container visible from a path. A depth of 5 cm (2 in) and spacing of approximately 10 cm (4 in) create a coherent cushion without compressing roots. Arrange a few stones around the clump to store warmth and emphasize the grey-green foliage while allowing water to drain freely. Pair the plant with crocuses, dwarf irises, saxifrages, small sedums, alpine pinks, or compact grasses that also appreciate freely drained soil. Avoid aggressive groundcovers, dense roots, and areas irrigated heavily. Repeat a second group farther away for subtle rhythm or concentrate the whole package near a pale stone that highlights the pink flowers. After bloom, allow foliage to complete its cycle and mark the position before dormancy. On a slope, position tubers where runoff does not fall directly on the clump. In a container, choose a restrained finish and keep drainage holes open through winter. Divide crowded groups while dormant and replant firm tubers in new gritty spaces. This layout keeps seasonal care accessible while protecting the low cushion from accidental trampling.

Frequently asked questions

When should silver shamrock tubers be planted?

Plant the tubers in fall after the soil has cooled and before it freezes. Choose full sun or bright partial shade in light, gritty, perfectly drained soil. Set each tuber 5 cm (2 in) deep and approximately 10 cm (4 in) from the next. Group all five tubers to create a visible cushion, cover with soil, and water deeply once. Avoid depressions where rainwater or snowmelt collects. In heavy clay, use a raised bed or container. Mark the position so resting tubers remain protected during dormancy. A thin layer of mature compost is enough when the soil is poor. A discreet label also makes spring identification easier.

What drainage does silver shamrock need?

Silver shamrock requires very fast drainage, especially during cold, wet periods. Use light, gritty, or sandy soil and improve the entire area rather than placing gravel only beneath each tuber. A raised bed or gentle slope is better than a depression. After rain, no water should remain around the clump. In containers, add perlite, pumice, or fine gravel to the mix, keep drainage holes open, and empty the saucer. Maintain gentle moisture during growth, then reduce watering as foliage enters dormancy. Avoid thick mulch that stays wet against the crown or slows evaporation after prolonged rain. Inspect the pot especially carefully after thawing and prolonged rain.

Can silver shamrock grow in a container?

Yes. Choose a stable container at least 20 cm (8 in) deep with several drainage holes, then fill it with porous mix containing perlite, pumice, or fine gravel. Plant all five tubers 5 cm (2 in) deep and approximately 8 to 10 cm (3 to 4 in) apart. Water, let every surplus drain, and place the pot in sun or bright partial shade. Avoid roof runoff and full saucers. After flowering, allow foliage to complete its cycle before reducing irrigation. In very cold locations, insulate the container walls or shelter the pot outdoors. Keep a visible label so resting tubers are not disturbed during dormancy.

Why do silver shamrock leaves or flowers close?

Oxalis leaves and flowers can change position according to light, temperature, and time of day. Closing during dark weather, in the evening, or through a cool period may therefore be normal. Check the soil when foliage remains collapsed in full daylight. Saturated soil, prolonged dryness, excessive heat, or damaged roots can also cause stress. Maintain gentle moisture without standing water and move a container into bright partial shade during intense heat. Do not add fertilizer to correct a watering problem. Observe the plant over several days before taking further action, and confirm that drainage holes remain open after rain. Regular observation helps distinguish this natural movement from genuine decline.

Is silver shamrock edible?

No. This product treats silver shamrock as an ornamental plant not intended for consumption. Oxalis species contain oxalic acid, which can be irritating or harmful in quantity. Keep tubers and foliage away from children and pets, do not add them to salads, and never use flowers as a garnish. Wear gloves if your skin is sensitive and wash your hands after planting or division. If ingestion or symptoms are suspected, contact a poison control centre, medical professional, or veterinarian promptly and retain the product label for identification. Store unused tubers in their clearly labelled package, separated from food products. A legible label reduces confusion during dormancy.

Wildlife and pets

Wildlife & precautions

Reported toxicity

Yes

Supporting wildlife

Pink silver shamrock flowers may receive bees and other insects when the corollas are open during bright weather. Extend available forage by combining the plant with simple flowers that bloom before and after it. Avoid insecticides during flowering. Actual visits vary with weather, location, and neighbouring plants. Maintain several compatible species rather than relying on this compact plant alone for pollinator support.