Kellogg's jewelflower

streptanthus glandulosus

Also known as: ["Kellogg's jewelflower","Kellogg's streptanthus"]

Family: Brassicaceae Genus: Streptanthus Category: Flowers

Overview

A herbaceous annual plant native to California, known for its distinctive flowers and glandular hairs.

Benefits & Perks

["wildlife attractant (bees, butterflies, birds)","rare/collector’s item"]

Botanical Classification

Phylum: Magnoliophyta
Class: Magnoliopsida
Order: Brassicales
Family: Brassicaceae
Genus: Streptanthus
Botanical Name: Streptanthus glandulosus

Plant Characteristics

Basic Information
  • Category: Flowers
  • Suitable Location: rock gardens, slopes, or containers in sunny areas
  • Suitable For:
    Collectors & Enthusiasts Wildlife Supporters
  • Is Weed: No
  • Allergenicity: low
Environmental Needs
  • Climate: {"temperatureRange":"5–30°C"}
  • Hardiness: {"zones":"7–10"}
  • Misting: rarely required, only if ambient humidity is very low
  • Drainage: Fast-draining to prevent waterlogging.
  • Soil Type: Well-draining, sandy loam with some organic matter.
Maintenance Level
  • Maintenance Level: moderate
  • Toughness Level: moderate
  • Pruning Frequency: As needed, typically after flowering or in early spring.
  • Pruning Intensity: Light pruning; remove only dead, diseased, or overgrown stems.
Care Details

Ideal Sunlight Coverage:
Full sun (6–8 hours/day); tolerates partial shade in intense summer heat.

Sunlight Tolerance Tips:
Acclimate gradually to intense sunlight; protect from harsh midday sun; adjust placement based on seasonal light intensity.

Warning Signs: Yellowing leaves, root rot, or stunted growth indicate poor soil conditions or overwatering.

Care Requirements

Care Difficulty
moderate

moderate

Sunlight

full sun to partial shade

Rotate plant for even light; use sheer curtains in summer; avoid direct afternoon sun in hot climates.

Watering

every 7–10 days during active growth, reduce in winter

Water thoroughly but infrequently; ensure soil dries between waterings; avoid overwatering.

Soil

well-draining, sandy or loamy soil with low organic matter

pH: Slightly acidic to neutral (pH 6.0–7.0).

Ensure soil dries between waterings; avoid heavy clay soils; amend with organic matter.

Temperature

Prefers moderate temperatures (60–75°F); tolerates cooler nights but avoids frost.

Protect from frost; avoid sudden temperature changes; adjust watering for heat.

Fertilizing

every 4–6 weeks during growing season, none in winter

Dilute fertilizer to half strength; fertilize after watering; stop in dormant periods.

Propagation

Methods

Seed propagation is most common; stem cuttings can also be used.

Step-by-Step Propagation Guide
  1. Prepare medium.
  2. Sow seeds or take cuttings.
  3. Maintain moisture.
  4. Provide warmth.
  5. Transplant once rooted.

Best Time: Spring or early summer when the plant is actively growing.

Environment

Warm (70–75°F), humid environment with bright indirect light.

Medium

Well-draining seed starting mix or cactus mix with perlite.

Hormone

Not typically required for seeds; rooting hormone can aid stem cuttings.

Timeline

Seeds may take 2–4 weeks to germinate; cuttings root in 3–6 weeks.

Tools Needed

Seed trays, pots, rooting hormone, misting spray bottle, heat mat.

Quick Tips

Use fresh seeds for best germination; keep soil consistently moist; provide bottom heat for faster rooting.

Pruning & Repotting

Pruning Guide
Method

Snip stems just above a leaf node or bud; avoid cutting into old wood.

Pruning Plan

Minimal pruning needed; focus on removing dead or damaged growth to maintain vigor.

Tools

Clean, sharp pruning shears or scissors.

Checklist

Sanitize tools; remove dead growth; make clean cuts; dispose of clippings.

Repotting Guide
Best Season

Spring, before the active growing season begins.

Pot Size

Choose a pot one size larger (1–2 inches wider) than the current one.

Method

Gently remove plant; trim roots if necessary; place in new pot with fresh soil; water lightly.

Suggestions

Repot only when root-bound or soil is depleted; typically every 2–3 years.

Checklist

Check root health; prepare new pot; use fresh soil; water after repotting.

Advanced Care Tips

Watering Mastery
Watering Checklist

Check soil moisture; water deeply; ensure drainage; adjust for season.

How to Apply Water Properly

Water at the base of the plant, ensuring moisture reaches the root zone; allow excess water to drain away; water in the morning to reduce evaporation.

Pro Tip: Use a watering can with a narrow spout to direct water to the roots without wetting foliage.
Watering Schedule Tips

Water deeply once the top inch of soil is dry; reduce frequency in winter to prevent root rot.

Soil Improvement

Add perlite or coarse sand for drainage; incorporate compost for fertility.

Temperature Stress Management
Signs of Temperature Issues

Wilting, leaf drop, or stunted growth in extreme heat or cold.

Cold Stress

Growth slows or halts; leaves may turn yellow or brown; risk of frost damage.

Solution: Move to a warmer location; provide frost protection in cold climates; avoid sudden temperature drops.

Hot Stress

Leaves may scorch, wilt, or drop; growth may slow in excessive heat.

Solution: Provide shade during peak heat; increase humidity; water more frequently but avoid waterlogging.

Fertilizing Guide
Fertilizing Checklist

Check season; dilute fertilizer; apply to moist soil; avoid contact with leaves.

Fertilizing Method

Use a balanced, diluted liquid fertilizer every 4–6 weeks during growing season; avoid fertilizing in winter.

Common Problems & Solutions

Yellowing leaves in Streptanthus glandulosus may indicate nutrient deficiencies, water stress, or disease, affecting photosynthesis and overall plant health.

Wilting in Streptanthus glandulosus can result from water stress, root damage, or pathogen infection, leading to reduced turgor pressure and impaired nutrient uptake.

Leaf spots on Streptanthus glandulosus may be caused by fungal or bacterial pathogens, leading to reduced photosynthetic efficiency and potential leaf drop.

Rotting, particularly root or stem rot, can occur in Streptanthus glandulosus due to overwatering or fungal infections, causing decay and eventual plant death.

Toxicity Warning

Cats
Toxic

Cats are highly susceptible to the toxic effects of Streptanthus glandulosus. Ingestion can result in severe poisoning, affecting multiple organ systems and requiring prompt veterinary care.

⚠️ Symptoms:
vomiting diarrhea lethargy loss of appetite tremors difficulty breathing
🌿 Toxic Parts:
entire plant
⚡ Toxic If:

if eaten

Ensure cats cannot access the plant. If ingestion is suspected, seek emergency veterinary treatment without delay.
Dogs
Toxic

Ingestion of Streptanthus glandulosus by dogs can lead to severe gastrointestinal and systemic toxicity. The plant's compounds are harmful to canine physiology, potentially causing serious health complications.

⚠️ Symptoms:
vomiting diarrhea lethargy loss of appetite abdominal pain tremors
🌿 Toxic Parts:
entire plant
⚡ Toxic If:

if eaten

Keep dogs away from the plant. If ingestion is suspected, contact a veterinarian immediately.
Humans
Toxic

Streptanthus glandulosus contains toxic compounds that can cause significant physiological distress upon ingestion. The plant's toxins interfere with cellular processes, leading to systemic effects that may require medical intervention.

⚠️ Symptoms:
nausea vomiting abdominal pain diarrhea dizziness weakness
🌿 Toxic Parts:
entire plant
⚡ Toxic If:

if eaten

Avoid ingestion. Keep out of reach of children and pets. If accidental ingestion occurs, seek immediate medical attention.
Important: Keep this plant out of reach of children and pets. If ingestion occurs, contact poison control or veterinary services immediately.

Frequently Asked Questions

Q: Is Streptanthus glandulosus toxic to pets?

A: There is no reliable information available regarding its toxicity to pets.

Q: How should I care for Streptanthus glandulosus?

A: It requires moderate care, including well-drained soil and full sun exposure.

Q: Does Streptanthus glandulosus attract wildlife?

A: Yes, it is known to attract bees, butterflies, and birds.

Quick Reference
Family: Brassicaceae
Care: moderate
Light: full sun to partial shade
Water: every 7–10 days during activ
Suitable For: ["collectors/enthusiasts","wildlife supporters (attracts bees, butterflies, birds)"]
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