Keith's Meyer Lemon Care Guide
A year-round, science-based care plan for a container-grown Meyer Lemon in Burbank, CA. Every recommendation is sourced from UC Agriculture and Natural Resources, UC Master Gardener programs, and UC IPM.
Establishment
- Repot into a container 2–4 inches larger with citrus potting mix
- Ensure pot has drainage holes — elevate on pot feet or bricks
- Place in full sun (6–8 hours daily) — south or west-facing ideal
- Water deeply when top 2 inches of soil is dry
- Begin half-strength citrus fertilizer after 4 weeks
- Inspect regularly for pests (aphids, scale, spider mites)
- Check below graft union for rootstock suckers — remove immediately
Annual Cycle
Winter
Spring
Summer
Fall
Your Meyer Lemon was purchased 2026-04-07 from Costco. The first 2 weeks are critical for acclimation. Do NOT repot or fertilize yet.
Weeks 1–2: Acclimation
- Keep in the original nursery pot
- Place in bright, indirect light for the first week, then gradually introduce to full sun over 7–10 days
- Water when top 1 inch of soil is dry
- Some leaf drop is normal — the tree is adjusting
- No fertilizer during this period
Weeks 3–4: Repotting
- Repot into a 10–15 gallon container (2–4 inches larger than nursery pot)
- Use well-draining citrus potting mix with perlite
- Ensure minimum 4 drainage holes
- Place in full sun (6–8 hours) — south or west-facing exposure
- Check below graft union for rootstock suckers — remove immediately
Weeks 4–6: First Feeding
- Begin half-strength citrus fertilizer after week 4
- Water deeply when top 2 inches of soil feels dry
- Elevate pot on feet or bricks for drainage and airflow
- Begin regular pest inspections
Weeks 6–8: Transition
- Transition to full fertilizer strength and regular care schedule
- Follow the seasonal calendar below for ongoing care
- Expect the first growth flush — monitor for pests on tender new leaves
Auto-selected to the current month. Each task includes priority level and UC extension source.
Watering
Increase as temps rise
ImportantTransition to every-other-day watering as Burbank temps climb into the 80s–90s. Check soil moisture daily.
Source: UCMG CC POTS
Fertilizing
Second fertilizer application
ImportantApply slow-release citrus fertilizer. This supports fruit set and summer growth. Water thoroughly after application.
Source: UCMG CC FERT
Pest Control
Monitor for leafminer
OptionalCitrus leafminer activity increases. Look for silvery serpentine trails on young leaves. Spinosad spray if needed.
Source: UCIPM CITRUS
General
Fruit set
ImportantSmall green fruit will appear as blossoms fade. Some natural fruit drop is normal — the tree self-thins. On young trees, remove excess fruit to reduce stress.
| Season | Frequency | Method | Notes |
|---|---|---|---|
| First 2 Weeks | Every 2–3 days | Light, even watering | Keep soil moist but not soggy during acclimation |
| Spring (Mar–May) | 2–3× per week | Deep soak until water drains from bottom | Increase as growth flushes begin |
| Summer (Jun–Sep) | Every 1–2 days | Deep soak, morning watering preferred | Containers dry fast in Burbank heat — check daily |
| Fall (Oct–Nov) | 2× per week | Deep soak | Reduce as temperatures cool and growth slows |
| Winter (Dec–Feb) | Every 7–10 days | Moderate watering | Soil dries slower — overwatering is the biggest winter risk |
Stick your finger 2 inches into the soil. If it feels dry, water deeply until water flows from the drainage holes. If it feels moist, wait another day. Overwatering kills more citrus trees than underwatering.
Containers in full Burbank sun can dry out in a single summer day. Terra cotta pots dry faster than plastic or glazed ceramic. Dark-colored pots absorb more heat. Morning watering is always preferred.
Sources:[UC MG Contra Costa][ANR 8549]
Citrus trees need a 2-1-1 NPK ratio (e.g., 6-3-3) with micronutrients including iron, zinc, and manganese. Use slow-release formulations designed for citrus. Follow product label rates for your container size.
| When | Product | NPK Ratio | Amount | Notes |
|---|---|---|---|---|
| Late January–February | Slow-release citrus fertilizer | 2-1-1 ratio (e.g., 6-3-3) | Per product label for container size | First application as new growth begins. Include iron, zinc, and manganese micronutrients. |
| May | Slow-release citrus fertilizer | 2-1-1 ratio (e.g., 6-3-3) | Per product label for container size | Second application during active spring growth and fruit set. |
| September | Slow-release citrus fertilizer | 2-1-1 ratio (e.g., 6-3-3) | Per product label for container size | Final application. Do NOT fertilize October through January — tree needs to harden off for winter. |
Signs of Nutrient Deficiency
- Iron (Fe): Yellowing leaves with green veins (iron chlorosis) — common in alkaline soil
- Zinc (Zn): Small, mottled, narrow leaves with yellow blotching between veins
- Manganese (Mn): Interveinal chlorosis on younger leaves, similar to iron but on newest growth
Do NOT fertilize October through January. The tree is semi-dormant and cannot absorb nutrients. Excess fertilizer salts will accumulate in the container soil and damage roots.
Your Meyer Lemon is grafted onto rootstock (likely trifoliate orange). Any growth below the graft union is rootstock and will overtake the Meyer Lemon if not removed. Check regularly and cut suckers flush to the trunk.
| When | Action | Details |
|---|---|---|
| Any time (urgent) | Remove rootstock suckers | Growth below the graft union is rootstock (often trifoliate orange). It will overtake the Meyer Lemon if not removed. Cut flush to the trunk. |
| Any time | Remove dead or damaged wood | Cut back to healthy green wood. Sterilize pruners between cuts if disease is suspected. |
| Late winter (Feb–Mar) | Shape pruning | Light pruning only — citrus stores energy in leaves. Remove crossing branches, water sprouts, and inward-growing shoots to improve air circulation. |
| After harvest | Thin interior canopy | Open up the canopy center for light penetration and airflow. Avoid heavy pruning — never remove more than 20% of the canopy in a year. |
Pruning Tips for Young Trees
- Citrus stores energy in its leaves — never remove more than 20% of the canopy in a year
- Focus on structure, not fruit production, in the first year
- Remove flowers on very young trees to redirect energy to root and branch development
- Sterilize pruning shears with rubbing alcohol between cuts if disease is suspected
Source:[UC MG Sonoma]
Huanglongbing (Citrus Greening / HLB)
HLB is the most serious citrus disease worldwide. There is no cure — prevention through ACP (Asian citrus psyllid) control is the only defense.
Symptoms
- Asymmetric blotchy mottling on leaves (not uniform yellowing)
- Lopsided, bitter fruit that stays partially green
- Stunted growth and twig dieback
- Tree decline over 3–5 years — no cure exists
Prevention
- Control Asian citrus psyllid (ACP) — the sole vector of HLB
- Inspect new growth flushes for ACP nymphs and adults
- Do not move citrus plants from quarantine areas
- Report suspected HLB to CDFA: 1-800-491-1899
Treatment
- There is no cure for HLB — infected trees must be removed
- Focus all effort on ACP prevention
Source:[UC IPM PN 74155]
Phytophthora Root Rot
Symptoms
- Yellowing and wilting leaves despite adequate watering
- Dark, mushy roots (healthy roots are white/tan)
- Gummosis (amber ooze) at the trunk base
- Gradual tree decline
Prevention
- Never let container sit in standing water — empty saucers after watering
- Use well-draining citrus potting mix
- Ensure minimum 4 drainage holes in the pot
- Elevate pot on feet or bricks for airflow beneath
Treatment
- Improve drainage immediately — repot if soil is compacted or waterlogged
- Trim away dark, mushy roots with sterilized shears
- Apply phosphonate fungicide (fosetyl-Al) as a drench per label directions
- Reduce watering frequency until recovery
Source:[UC IPM Pub 3441]
Sooty Mold
Symptoms
- Black, powdery coating on leaves and fruit
- Does not damage the plant directly — blocks sunlight
- Always associated with honeydew-producing pests (scale, aphids, whitefly)
Prevention
- Control sap-sucking pests that produce honeydew
- Maintain good air circulation around the tree
Treatment
- Treat the underlying pest problem — sooty mold will resolve on its own
- Wash leaves with a gentle spray of water to remove heavy mold buildup
Source:[UC IPM Pub 3441]
Asian Citrus Psyllid (ACP)Diaphorina citri
ACP is the sole vector of HLB (citrus greening). Report sightings to CDFA: 1-800-491-1899. Do not move citrus plants from quarantine areas.
Timing & ID
When: Year-round, peaks during new growth flushes (spring & fall)
ID: Tiny (3 mm) mottled-brown insect that feeds at a 45° angle with head down — unique posture. Nymphs produce white, waxy tubules.
Treatment Products
- Horticultural oil spray (suffocates nymphs and adults)
- Insecticidal soap for light infestations
- Imidacloprid soil drench for severe infestations (systemic, follow label carefully)
Details
- ACP is the sole vector of HLB (citrus greening) — the most serious citrus disease worldwide
- California has an active ACP quarantine — do not move citrus plants between properties
- Report ACP sightings to CDFA: 1-800-491-1899 or your local agricultural commissioner
- Inspect every new growth flush for nymphs on young leaf tips
- The parasitoid wasp Tamarixia radiata provides biological control in SoCal
Source:[UC IPM]
Citrus LeafminerPhyllocnistis citrella
Timing & ID
When: Summer through fall (peaks Jul–Sep during growth flushes)
ID: Serpentine silvery trails (mines) on the surface of young leaves. Larvae are tiny and feed inside the leaf tissue.
Treatment Products
- Spinosad spray when new flush is emerging
- Horticultural oil on young growth
- Avoid broad-spectrum insecticides — they kill natural enemies
Details
- Primarily cosmetic damage on mature trees — rarely threatens tree health
- Young trees are more vulnerable as they have fewer leaves
- Natural enemies (parasitic wasps) provide significant control in SoCal
- Damaged leaves still photosynthesize — do not remove them
Source:[UC IPM Pub 3441]
Scale InsectsVarious (California red scale, soft brown scale)
Timing & ID
When: Year-round, worst in warm months
ID: Small, immobile bumps on stems and leaf undersides. Soft scale produces honeydew; armored scale does not.
Treatment Products
- Horticultural oil spray (winter dormant or summer rate)
- Insecticidal soap for crawlers (immature stage)
- Scrape off individual scales with a soft brush on small trees
Details
- Soft scale produces honeydew → sooty mold
- Armored scale (red scale) directly damages bark and fruit
- Target the crawler stage (spring) for best chemical control
- Lady beetles and parasitic wasps are effective natural enemies
Source:[UC IPM]
Spider MitesPanonychus citri / Tetranychus urticae
Timing & ID
When: Hot, dry weather (Jun–Sep)
ID: Tiny dots on leaf undersides. Stippled, bronzed, or yellowed leaves. Fine webbing in severe cases.
Treatment Products
- Strong water spray to dislodge mites (repeat every 3–5 days)
- Horticultural oil or insecticidal soap
- Avoid broad-spectrum insecticides — they flare mite populations by killing predators
Details
- Dusty conditions worsen infestations — rinse foliage periodically
- Predatory mites (Phytoseiulus spp.) provide excellent biological control
- Hot Burbank summers are ideal conditions for mite outbreaks
- Container trees near walls or pavement are especially vulnerable to heat stress and mites
Source:[UC IPM]
AphidsAphis spiraecola / Aphis gossypii
Timing & ID
When: Spring growth flushes (Mar–May)
ID: Clusters of small, soft-bodied insects on tender new growth and flower buds. Curled or distorted new leaves.
Treatment Products
- Strong water spray to knock off aphids
- Insecticidal soap for moderate infestations
- Avoid broad-spectrum insecticides — lady beetles and lacewings control aphids naturally
Details
- Produce honeydew → sooty mold
- Usually self-limiting — natural enemies catch up within 2–3 weeks
- Ants farm aphids for honeydew — control ants with sticky barriers on the trunk
- Heavy nitrogen fertilization promotes the lush growth aphids prefer
Source:[UC IPM Pub 3441]
Pot Sizing
- Current: Costco Meyer Lemons typically come in a 5-gallon nursery pot. Keep in this pot during the 2-week acclimation period.
- Next size: Move to a 10–15 gallon pot (16–18 inches diameter) after acclimation
- Eventual: Mature container Meyer Lemons do well in 15–25 gallon pots
Soil Mix
Well-draining citrus mix: 1/3 peat or coco coir, 1/3 perlite, 1/3 composted bark — or a commercial citrus/cactus potting mix
- Minimum 4 drainage holes in the pot
- Elevate pot on feet, bricks, or a plant caddy for airflow beneath
- Use a saucer but empty it 30 minutes after watering — never let roots sit in water
Repotting Steps
Frequency: Every 2–3 years, or when roots circle the container bottom
- Water tree thoroughly 1 day before repotting
- Choose a pot 2–4 inches larger in diameter than the current one
- Gently loosen circling roots on the root ball edges
- Add fresh citrus potting mix around the root ball
- Do NOT bury the trunk deeper than the original soil line
- Water thoroughly after repotting, then withhold fertilizer for 2–4 weeks
Salt & Mineral Management
- Burbank municipal water can have moderate mineral content
- Leach container soil 1–2x per year: water deeply 3–4 times in succession, letting it drain fully each time
- White crusty deposits on the soil surface or pot rim indicate salt buildup
- Replace top 2 inches of soil annually with fresh citrus mix
Burbank is Zone 10a with occasional frost events December through February. Average last frost: mid-February. Average first frost: mid-December.
Damage threshold: 28°F (−2°C) — Meyer Lemons are more cold-hardy than most citrus but will sustain damage at this temperature.
Outdoor Protection
- Move container indoors or to a covered patio when frost is forecast
- If too heavy to move, wrap the canopy and trunk with frost cloth or burlap
- Water soil thoroughly before a frost event — moist soil holds and radiates more heat
- Place incandescent string lights (not LED) under frost cloth for added warmth
- Avoid placing the tree near cold north-facing walls or exposed concrete in winter
- Use a plant caddy with wheels for easy relocation of large containers
Indoor Overwintering
- Place near the brightest south-facing window available
- Keep away from heating vents — dry forced air causes leaf drop
- Maintain humidity with a pebble tray or room humidifier
- Reduce watering (soil dries much slower indoors) but never let it dry completely
- Return outdoors after the last frost — re-acclimate gradually over 7–10 days
- Indoor stays should be as short as possible — citrus needs outdoor light
Source:[UC MG Sonoma]
pH Requirements
Ideal pH: 6.0–7.0
Test frequency: Annually for container trees (inexpensive pH probe meters work well)
- pH below 6.0 → add dolomitic limestone to the soil surface
- pH above 7.0 → add soil sulfur or switch to an acidifying citrus fertilizer
Container Soil Tips
- Test container soil pH with an inexpensive probe meter — available at garden centers
- Leach container soil 1–2× per year to prevent salt and mineral buildup
- Replace top 2 inches of soil annually with fresh citrus mix
- Use fertilizers that include chelated micronutrients (iron, zinc, manganese)
Micronutrient Deficiency Guide
- Iron (Fe): Yellowing leaves with green veins (iron chlorosis) — common in alkaline soil
- Zinc (Zn): Small, mottled, narrow leaves with yellow blotching between veins
- Manganese (Mn): Interveinal chlorosis on younger leaves, similar to iron but on newest growth
All recommendations in this guide are sourced from UC Agriculture and Natural Resources (UC ANR), UC Master Gardener programs, and UC Integrated Pest Management (UC IPM).
Meyer Lemon
UC MG Contra CostaGrowing Citrus in Pots
UC MG Contra CostaFertilizing Citrus
UC IPMAsian Citrus Psyllid — Pest Management Guidelines
UC IPM Pub 3441Citrus Pest Management Guidelines
UC IPM PN 74155Asian Citrus Psyllid and Huanglongbing Disease
ANR 8549Drought Tip: Irrigating Citrus with Limited Water
UC MG Santa ClaraGrowing Great Citrus
UC ANR SacramentoGrowing Citrus in Sacramento
UC MG MarinCitrus
UC IPMScales — Citrus Pest Management Guidelines
UC IPMCitrus Red Mite and Two-Spotted Spider Mite