Crabgrass
digitaria sanguinalis
Also known as: ["Large crabgrass","Summer grass","Hairy crabgrass"]
Overview
A widespread annual grass species often considered a weed in lawns and agricultural fields due to its rapid growth and spreading habit.
Benefits & Perks
["fast growing","drought tolerant"]
Botanical Classification
| Phylum: | Magnoliophyta |
| Class: | Liliopsida |
| Order: | Poales |
| Family: | Poaceae |
| Genus: | Digitaria |
| Botanical Name: | Digitaria sanguinalis |
Plant Characteristics
Basic Information
- Category: Herbs & Weeds
- Suitable Location: garden beds or lawns in temperate regions
- Suitable For:
- Is Weed: No
- Allergenicity: low
Environmental Needs
- Climate: {"temperatureRange":"10–35°C"}
- Hardiness: {"zones":"3–9"}
- Misting: rarely required
- Drainage: Fast-draining to prevent waterlogging.
- Soil Type: Well-draining, loamy soil with added organic matter.
Maintenance Level
- Maintenance Level: very low
- Toughness Level: very high
- Pruning Frequency: As needed, but generally every 2–3 months during growing season.
- Pruning Intensity: Moderate; remove up to one-third of growth if overgrown.
Care Details
Ideal Sunlight Coverage:
Full sun (6–8 hours/day); tolerates partial shade but may become less vigorous.
Sunlight Tolerance Tips:
Acclimate plants gradually to intense sunlight; avoid sudden exposure to prevent scorching; for indoor plants, place near a south-facing window with filtered light.
Care Requirements
Care Difficulty
very easymoderate
Sunlight
full sun to partial shade
Rotate plants for even light exposure; use sheer curtains to filter intense sun; monitor for signs of sunburn.
Watering
every 7–10 days during active growth, reduce in winter
Water thoroughly but infrequently; ensure soil dries between waterings; avoid overhead watering to prevent fungal issues.
Soil
well-drained, fertile loam
pH: Slightly acidic to neutral (pH 6.0–7.0).
Avoid heavy clay soils; ensure pots have drainage holes; test soil pH annually.
Temperature
Prefers warm temperatures (65–85°F/18–29°C); thrives in summer heat; sensitive to frost.
Avoid sudden temperature fluctuations; protect from frost; ensure good air circulation in hot weather.
Fertilizing
every 4–6 weeks during growing season
Apply fertilizer to moist soil to prevent root burn; flush soil occasionally to prevent salt buildup; use slow-release fertilizer for consistent feeding.
Propagation
Methods
Stem cuttings or division; seeds can also be used but may be less reliable.
Step-by-Step Propagation Guide
- Take a 4–6 inch cutting.
- Remove lower leaves.
- Dip in rooting hormone (optional).
- Plant in moist medium.
- Maintain humidity.
Best Time: Spring or early summer when growth is active.
Environment
Warm (70–75°F/21–24°C), humid, and bright indirect light.
Medium
Well-draining potting mix (e.g., peat-based with perlite or sand).
Hormone
Optional but recommended for faster rooting.
Timeline
Roots may develop in 2–4 weeks; new growth in 6–8 weeks.
Tools Needed
Pruning shears, rooting hormone, small pots, misting spray bottle.
Quick Tips
Use healthy, non-flowering stems; maintain consistent moisture; provide bottom heat for faster rooting.
Pruning & Repotting
Pruning Guide
Method
Pinch back tips for bushier growth; cut stems just above a leaf node or lateral branch.
Pruning Plan
Prune to maintain shape, encourage bushier growth, and remove dead or diseased foliage.
Tools
Sharp pruning shears, sterilized scissors.
Checklist
Sterilize tools; prune dead/damaged growth; shape plant; clean up debris.
Repotting Guide
Best Season
Spring, before active growth begins.
Pot Size
Choose a pot 1–2 inches larger in diameter than the current one.
Method
Remove plant gently; trim roots if necessary; place in new pot with fresh soil; water lightly.
Suggestions
Repot every 1–2 years or when roots fill the pot; beneficial for nutrient replenishment and root health.
Checklist
Select new pot; prepare fresh soil; inspect roots; 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 morning to minimize evaporation and fungal growth.
Watering Schedule Tips
Water deeply once the top inch of soil feels dry; reduce frequency in winter to prevent root rot.
Soil Improvement
Add perlite or sand for drainage; incorporate compost for fertility; ensure soil is loose and airy.
Temperature Stress Management
Signs of Temperature Issues
Chlorosis or browning of leaves in extreme heat; stunted growth or dieback in cold conditions.
Cold Stress
Growth slows or halts; leaves may turn yellow or brown; plant may become more susceptible to disease.
Solution: Provide frost protection (e.g., row covers); move potted plants indoors; avoid overwatering in cold conditions.
Hot Stress
Wilting despite moist soil; leaf scorch or browning; reduced vigor and flowering.
Solution: Provide shade during peak heat; increase watering frequency; mulch to retain soil moisture.
Fertilizing Guide
Fertilizing Checklist
Check fertilizer type; dilute correctly; apply to soil; avoid foliage contact.
Fertilizing Method
Use a balanced, water-soluble fertilizer diluted to half strength; fertilize every 4–6 weeks during growing season (spring/summer); avoid fertilizing in winter.
Common Problems & Solutions
Toxicity Warning
Cats
Non-toxicDigitaria sanguinalis is not toxic to cats. The plant does not produce any known toxic compounds that would harm cats upon ingestion or contact.
⚡ Toxic If:
Not applicable
Dogs
Non-toxicDigitaria sanguinalis is not toxic to dogs. There are no known toxic effects or physiological impacts associated with this plant when ingested or touched by dogs.
⚡ Toxic If:
Not applicable
Humans
Non-toxicDigitaria sanguinalis, commonly known as hairy crabgrass, is not considered toxic to humans. It is a common weed that does not produce any known toxic compounds harmful to human health.
⚡ Toxic If:
Not applicable
Frequently Asked Questions
Q: Is crabgrass harmful to pets?
A: No, crabgrass is non-toxic to dogs and cats.
Q: How can I control crabgrass in my lawn?
A: Use pre-emergent herbicides in early spring or manually remove the plants.
Q: Does crabgrass have any uses?
A: While primarily considered a weed, crabgrass can be used as forage for livestock in some regions.
Quick Reference
| Family: | Poaceae |
| Care: | very easy |
| Light: | full sun to partial shade |
| Water: | every 7–10 days during activ |
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