Tall Sisymbrium, Tumble Mustard
sisymbrium altissimum
Also known as: ["Tall Sisymbrium","Tumble Mustard"]
Overview
An annual herbaceous plant in the Brassicaceae family, known for its tall, slender stems and small, yellow flowers.
Benefits & Perks
["drought tolerant","wildlife attractant (bees, butterflies, birds)"]
Botanical Classification
| Phylum: | Magnoliophyta |
| Class: | Magnoliopsida |
| Order: | Brassicales |
| Family: | Brassicaceae |
| Genus: | Sisymbrium |
| Botanical Name: | Sisymbrium altissimum |
Plant Characteristics
Basic Information
- Category: Herbs & Weeds
- Suitable Location: open, sunny garden bed or field
- Suitable For:
- Is Weed: No
- Allergenicity: low
Environmental Needs
- Climate: {"temperatureRange":"5–35°C"}
- Hardiness: {"zones":"3–9"}
- Misting: rarely required
- Drainage: Fast-draining to prevent waterlogging.
- Soil Type: Well-draining, sandy loam with some organic matter; tolerates poor soils.
Maintenance Level
- Maintenance Level: very low
- Toughness Level: very high
- Pruning Frequency: As needed; typically light pruning after flowering or in early spring.
- Pruning Intensity: Light to moderate; avoid heavy pruning unless necessary to control size or shape.
Care Details
Ideal Sunlight Coverage:
Full sun (6–8 hours of direct sunlight daily); adjust for extreme heat by providing partial shade.
Sunlight Tolerance Tips:
Acclimate plants gradually to intense sunlight; protect from scorching midday sun; move indoor plants to a south-facing window for optimal light.
Care Requirements
Care Difficulty
very easyeasy
Sunlight
full sun
Rotate plants for even light exposure; use sheer curtains to filter intense sun; avoid placing near large windows that cause overheating.
Watering
every 7–10 days during active growth, less frequently in dormant periods
Water thoroughly but infrequently; ensure soil dries between waterings; avoid overhead watering.
Soil
well-drained, sandy or loamy soil
pH: Slightly alkaline to neutral (pH 6.5–7.5).
Use raised beds for better drainage; avoid overwatering; test soil pH annually.
Temperature
Prefers moderate temperatures (60–75°F or 15–24°C); tolerates heat but may struggle below 50°F (10°C).
Monitor temperature fluctuations; use a thermometer to track conditions; adjust care based on seasonal changes.
Fertilizing
rarely required, if used then every 4–6 weeks during spring and summer
Apply fertilizer after watering to prevent root burn; flush soil occasionally to prevent salt buildup; use organic options like compost tea.
Propagation
Methods
Seed propagation is most common; direct sow in spring or fall for best results.
Step-by-Step Propagation Guide
- Prepare medium.
- Sow seeds lightly.
- Keep moist.
- Thin seedlings as needed.
- Transplant when established.
Best Time: Spring or early fall when temperatures are mild and growth is active.
Environment
Warm, bright location with good air circulation; keep soil consistently moist but not waterlogged.
Medium
Well-draining soil mix with sand or perlite; can also be sown directly in garden beds.
Hormone
Not required for seeds; rooting hormone may help if using cuttings (though less common).
Timeline
Seeds germinate in 1–3 weeks; plants reach maturity in 2–3 months.
Tools Needed
Seed trays, soil mix, watering can, labels, and a light source (if indoors).
Quick Tips
Sow seeds shallowly; keep soil warm; thin seedlings to prevent overcrowding; harden off before transplanting.
Pruning & Repotting
Pruning Guide
Method
Use clean cuts just above a leaf node or branch junction; remove spent flowers to encourage reblooming.
Pruning Plan
Minimal pruning needed; focus on removing dead or damaged foliage to maintain plant health.
Tools
Pruning shears, scissors, or a sharp knife.
Checklist
Clean tools; make precise cuts; remove dead/damaged parts; sanitize tools after use.
Repotting Guide
Best Season
Early spring before new growth begins.
Pot Size
Increase pot size by 1–2 inches in diameter; ensure good drainage.
Method
Gently remove plant; trim roots if necessary; place in a slightly larger pot with fresh soil; water lightly.
Suggestions
Not typically required unless grown in containers; repot if roots are crowded or growth slows.
Checklist
Choose appropriate pot; prepare new soil; handle roots carefully; water after repotting.
Advanced Care Tips
Watering Mastery
Watering Checklist
Check soil moisture; water deeply; ensure drainage; avoid wetting foliage.
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 early in the day to minimize evaporation.
Watering Schedule Tips
Water deeply once the top inch of soil is dry; reduce frequency in winter to prevent root rot.
Soil Improvement
Add sand or perlite for drainage; incorporate compost for fertility; avoid heavy clay soils.
Temperature Stress Management
Signs of Temperature Issues
Wilting, yellowing leaves, stunted growth, or premature flowering in response to stress.
Cold Stress
Slows growth, may cause leaf drop, and can lead to fungal infections in prolonged cold.
Solution: Move plants to a warmer location; use a heat mat for seedlings; cover outdoor plants with frost cloth.
Hot Stress
Leaf scorch, wilting, and reduced flowering due to excessive heat.
Solution: Provide shade during peak heat; increase watering frequency; use mulch to retain soil moisture.
Fertilizing Guide
Fertilizing Checklist
Check fertilizer label; dilute correctly; apply to moist soil; avoid contact with foliage.
Fertilizing Method
Use a balanced liquid fertilizer diluted to half strength every 4–6 weeks during the growing season; avoid fertilizing in winter.
Common Problems & Solutions
Toxicity Warning
Cats
Slightly ToxicCats that ingest Sisymbrium altissimum may experience mild gastrointestinal irritation. The glucosinolates in the plant can cause digestive upset, though serious health issues are rare.
⚠️ Symptoms:
🌿 Toxic Parts:
⚡ Toxic If:
if eaten
Dogs
Slightly ToxicIngestion of Sisymbrium altissimum by dogs can lead to mild gastrointestinal upset due to the presence of glucosinolates. The effects are typically not severe but can cause discomfort.
⚠️ Symptoms:
🌿 Toxic Parts:
⚡ Toxic If:
if eaten
Humans
Slightly ToxicSisymbrium altissimum contains glucosinolates which can cause mild gastrointestinal distress upon ingestion. The physiological impact is generally limited to irritation of the digestive tract.
⚠️ Symptoms:
🌿 Toxic Parts:
⚡ Toxic If:
if eaten
Frequently Asked Questions
Q: Is Sisymbrium altissimum edible?
A: It is not commonly consumed, and its edibility is not well-documented.
Q: Does it attract wildlife?
A: Yes, it attracts bees, butterflies, and birds.
Q: Is it invasive?
A: Yes, it can be considered invasive in some regions due to its rapid growth and seed dispersal.
Quick Reference
| Family: | Brassicaceae |
| Care: | very easy |
| Light: | full sun |
| Water: | every 7–10 days during activ |
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