Lavender Care Guide
Lavandula angustifolia
Quick Answer
Lavender is more forgiving than most people expect, but consistent care makes a big difference. Water when the top 1–2 inches of soil are dry rather than on a fixed schedule, give it adequate light for its category, and feed lightly during the growing season. Catching problems early — a change in leaf colour or texture — is the key to keeping it healthy.
⭐Difficulty
Moderate indoors
☀️Light
Full sun
💧Watering
Every 7–14 days
🌫️Humidity
Low (30–40%)
🌡️Temperature
10–85°F
📈Growth Rate
Slow–Moderate
Toxicity
Source: ASPCA Animal Poison Control
Watering
Summer
Every 7–14 days
Winter
Every 14–21 days
Method: Allow soil to dry between waterings; drought tolerant once established; excellent drainage essential; overwatering kills quickly
In summer, aim to water lavender approximately every 7–14 days; in winter cut back to around every 14–21 days. Rather than following a calendar, let the soil dry out completely — all the way to the bottom of the pot. Water thoroughly until water drains from the bottom, then don't water again until the soil passes the dryness check. Soft or mushy leaves signal overwatering; slight wrinkling or shrivelling means it's time to water.
Light Requirements
Full sun
Lavender does best in a south- or west-facing windowsill where it gets at least 2–4 hours of direct sun. Without direct light, Lavender stretches toward the light source, loses its compact shape, and colour or markings may fade.
Soil & Potting
Soil: Sandy, alkaline, gritty mix with added perlite or fine gravel; well-draining essential
Pot: Terracotta with drainage; elevate for airflow under pot
Temperature & Humidity
Temperature: 10–85°F (-12–29°C)
Humidity: Low (30–40%)
Fertilizing
Frequency: Once in spring; minimal
Type: Very diluted balanced fertilizer or none
Common Problems
Root rot
Root rot: Overwatering + poor drainage. Sandy gritty mix in terracotta is essential. Check the roots: if they're dark, mushy, or smell off, root rot has set in. Unpot the plant, trim all affected roots with clean scissors, dust with cinnamon, and repot in fresh dry mix before resuming a cautious watering schedule.
Woody center with no new growth
Woody center with no new growth: Insufficient pruning. Prune in spring, never fall. Catching the problem early makes it much easier to fix — watch for early warning signs and act before the plant is in serious distress.
Powdery mildew
Powdery mildew: Poor air circulation indoors. Improve airflow; treat with neem. Catching the problem early makes it much easier to fix — watch for early warning signs and act before the plant is in serious distress.
No blooms
No blooms: Insufficient light. Needs 6+ hours direct sun. Catching the problem early makes it much easier to fix — watch for early warning signs and act before the plant is in serious distress.
Propagation
The easiest way to propagate Lavender is by stem cuttings. Take a 4–6 inch cutting that includes at least one node (the point where a leaf attaches). Remove any leaves that would be submerged, then place it in water or directly into moist potting mix. In water, roots appear within 2–4 weeks; pot up once they reach an inch long. The thing that trips people up most: taking a cutting without a node. Without a node, the cutting stays green for weeks but will never root.
Seasonal Care Calendar
🌸 Spring
Spring is when Lavender starts actively pushing new growth as day length and light intensity increase. Increase watering frequency as the plant becomes more active, begin fertilising every 2–4 weeks with a balanced liquid fertiliser, and this is the ideal window for repotting or taking cuttings.
☀️ Summer
Summer is peak growing season — Lavender is working hard and using water and nutrients faster than at other times of year. Water more frequently but check the soil rather than going on a fixed schedule, since heat and higher light accelerate drying. If you move it outdoors, introduce it to conditions gradually to prevent sun scorch.
🍂 Fall
Fall is a transition: Lavender grows more slowly as light levels decrease. Reduce watering frequency slightly, stop fertilising by late October, and move it closer to a window to compensate for shorter days. Avoid drafts from opening windows as temperatures drop. Watch for flower buds developing around late spring–summer — avoid repotting or relocating the plant at this time.
❄️ Winter
In winter, Lavender enters a slower-growth phase and uses water more slowly than in summer. Water less frequently to avoid root issues from soil staying wet too long in low light. If your home is heated and the air is dry, a pebble tray or humidifier keeps the plant comfortable.