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How to Grow Notocactus submammulosus

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Notocactus submammulosus

Notocactus submammulosus (Lem.) A.C. Weber

shrub

Notocactus submammulosus is a small, globular cactus native to South America, featuring distinctive rounded, nipple-like tubercles covering its surface. It produces vibrant yellow flowers and is a popular choice for collectors and succulent enthusiasts. The plant grows slowly and requires minimal maintenance once established.

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Example Notocactus submammulosus timeline · Pittsburgh, PA (Zone 6b)

  1. Plant Notocactus submammulosus

    Around Apr 17

    Near Pittsburgh's average last spring frost.

  2. Tend & protect

    Late spring–summer

    Watering, feeding, and pest-watch reminders.

  3. Harvest Notocactus submammulosus

    Late summer into fall

    Before the first fall frost (≈ Nov 8)

Sample dates for Pittsburgh, PA. Sign up to get exact Notocactus submammulosus dates for your own zip code.

Growing Conditions

☀️
Sun: Full sun, 6-8 hours daily; bright indirect light acceptable but reduces flowering
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Water: Water deeply but infrequently during growing season (spring/summer); allow soil to dry completely between waterings. Reduce watering significantly in winter (every 4-6 weeks). Overwatering is the primary cause of rot.
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Spacing: 6 inches
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Days to maturity: Not applicable; flowering occurs after 3-4 years of growth
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Planting depth: Plant with base of cactus at soil surface; do not bury stem

Soil

Type: Well-draining cactus/succulent mix
pH: 6.0-7.0
Amendments:
Perlite or pumice (30-50% of mix) Coarse sand Compost (minimal, 10-20%) Gravel or small stones for drainage

Growing Zones

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Thrives in zones 9b-11; can be grown outdoors year-round in warm climates, or as a container plant indoors/greenhouse elsewhere

9b 10a 10b 11a 11b

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Growth Stages

1

Seedling (if propagating from seed)

2-3 months

Tiny green globules, 2-5mm diameter, with minimal visible tubercles

Keep soil lightly moist (not wet); provide bright indirect light; maintain 70-75°F temperature; may take 2-4 weeks to germinate

2

Juvenile

1-2 years

Small round globe, 0.5-1 inch diameter, with developing tubercles becoming more prominent

Gradually increase light exposure; water sparingly; begin winter dormancy period; protect from temperatures below 50°F

3

Vegetative Growth

Ongoing (2-3 years until flowering maturity)

Mature globular form with fully developed tubercles and spines, 1-3 inches diameter, compact and dense

Maintain consistent watering during growing season; ensure excellent drainage; rotate pot for even light exposure; fertilize monthly with diluted succulent fertilizer in spring/summer

4

Flowering

4-8 weeks (multiple flowers produced in succession)

Bright yellow flowers, 0.5-1 inch diameter, emerge from crown of plant in spring/early summer; flowers open during day and close at night

Provide cool winter rest period (50-55°F for 6-8 weeks) to trigger flowering; maintain full sun exposure; do not overwater during bud formation; flowers last 1-2 days each

5

Post-flowering/Dormancy

4-6 months

Plant returns to vegetative appearance; may produce small fruits; growth slows significantly in late fall and winter

Reduce watering drastically; keep cool (50-55°F); minimal fertilization; allow complete dormancy period for next season's flowering

Companion Planting

Plan your garden →

Plant with:

Echeveria species Jade plant Sempervivum Aloe vera Haworthia Other Notocactus species Lithops Rebutia species

Avoid planting near:

Moisture-loving plants (ferns, impatiens) Plants requiring frequent watering Fungus-prone species in humid conditions

Common Pests

  • Spray with insecticidal soap or neem oil; isolate affected plant; inspect regularly for infestation; remove with cotton swab dipped in rubbing alcohol

  • Increase humidity slightly with misting; improve air circulation; spray with neem oil or insecticidal soap; severe infestations may require miticide

  • Remove manually with soft brush or cloth; apply horticultural oil or insecticidal soap; treat repeatedly every 7-10 days until eliminated

  • Prevent with proper drainage and reduced watering; if present, remove plant from pot, trim rotted roots with sterile knife, repot in fresh dry soil; hold water for 1-2 weeks

Uses

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Ornamental succulent display

Craft

Notocactus submammulosus is prized by cactus collectors for its distinctive appearance, compact growth habit, and striking yellow flowers. It is ideal for succulent gardens, container collections, and alpine troughs. [source]

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Low-maintenance houseplant

Household

With minimal watering and care requirements, this cactus is an excellent choice for busy gardeners or office environments. It thrives on neglect and requires no fertilization or pruning. [source]

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Pollinator attraction

Wildlife

The bright yellow flowers attract bees and other pollinators, contributing to garden biodiversity when grown outdoors in warm climates. [source]

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Traditional ethnobotanical uses

Medicinal

Some Notocactus species have been used in traditional South American medicine for treating inflammation and wounds, though scientific validation is limited and use is not widespread. [source]

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Cactus fruit potential

Culinary

While not commonly consumed, Notocactus submammulosus produces small edible fruits (tunas) after flowering, though they are minimal in size and primarily of botanical interest. [source]

This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.

Harvest Tips

This is an ornamental/collector plant, not typically harvested for food or material. Flowers bloom in spring/early summer and last only 1-2 days each; enjoy them in situ. Small round fruits may develop after flowering; allow them to mature and dry naturally if seeds are desired, then collect once fully desiccated.

Fun Facts

  • 🌱 The name 'submammulosus' refers to the small, mammilla (nipple)-like tubercles that cover the plant's surface, which are a distinctive taxonomic feature of this species.
  • 🌱 Notocactus submammulosus is native to southern Brazil and northern Argentina, where it grows in rocky grasslands and scrubland at moderate altitudes.
  • 🌱 This species can live for 20-30 years or more in cultivation with proper care, making it a long-term investment for collectors; some specimens in botanical gardens are over 50 years old.

Gardening Terms

New to gardening? Learn about terms used in this guide:

Crown Full Sun
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