Plant care
Avocado (alligator pear) care
Persea americana
Also called Hass avocado, Fuerte avocado, alligator pear.
Light
Avocado is a sun-lover and needs the brightest spot in the home to thrive. 6-8 hours of direct sun for fruiting trees; bright indirect light for foliage-only indoor pit growers. Indoors that almost always means a south or west-facing windowsill in the northern hemisphere. Plants moved abruptly from low light to direct sun will scorch — acclimate them over 7-10 days by giving a little more sun each day.
Watering
Outdoor avocado crops want when the top 3-5 cm of soil is dry, every 5-10 days. The single best habit is a finger-test before watering — push a finger 3-4 cm into the soil. If it comes back damp, wait a day. If it comes back dust-dry, water deeply at the base of the plant. Avocados hate both drought and waterlogging. Deep watering with full drainage.
Soil and pot
Avocado grows best in free-draining slightly acidic loam. pH 6.0-7.0. Container mix with extra perlite. A pot with a working drainage hole is non-negotiable for this species — even free-draining mix will turn soggy in a closed planter. If you love the look of a decorative pot without a hole, use it as a cachepot around an inner nursery pot you can lift out to water.
Humidity and temperature
Avocado sits happiest at around 50-70% humidity and 15-29°C (60-85°F). Higher humidity reduces leaf-tip browning indoors. If you keep the room above 15 year-round and avoid placing the plant near a cold draught, a hot radiator, or an air-conditioning vent, you have already handled the two biggest indoor stressors.
Fertilising
Feed avocado sparingly. A balanced citrus or fruit-tree feed monthly during the growing season. Skip fertiliser entirely on a stressed, recently-repotted, or actively wilting plant — fertiliser salts make damage worse, not better. Wait for a round of healthy new growth before resuming a feeding rhythm.
Common problems
Below are the issues we see most often on avocado in the Growli community. Each is annotated with the most common cause so you know where to start.
- Pit grown indoors stays leafless — Insufficient light; move to the sunniest window or use a grow light.
- Brown leaf tips — Chloride or salt build-up from tap water; flush with rainwater periodically.
- Yellow leaves — Overwatering and root rot, or iron chlorosis in alkaline soil.
- No fruit on indoor trees — Avocados need a partner cultivar of the opposite flower type (A or B) and tropical conditions.
Companion plants
Avocado pairs well with Citrus, and Rosemary. These are species with similar light and water needs, so you can grow them in the same bed or container without conflict.
Propagation
Pit germination in water or soil for fun; commercial trees are grafted for early fruiting and reliable variety. Propagation is the cheapest, most satisfying way to expand a collection — and it doubles as insurance against losing a mature plant to an accident. Take a backup cutting once the parent is established and healthy.
Toxicity to pets
Avocado is toxic to pets. ASPCA lists Persea americana as toxic to cats, dogs, horses, and especially birds and ruminants, due to persin. Leaves, bark, seed, and skin are most concentrated; the flesh is low-risk for dogs and cats but unsafe for birds and rabbits. If you keep cats, dogs, or curious children in the house, weigh placement carefully — a high shelf or a hanging planter is enough for casual safety. For severe ingestion incidents, call your local vet and the ASPCA Animal Poison Control Center (in the US, 888-426-4435).
Pet-safety status is sourced from the ASPCA Toxic and Non-Toxic Plant List, which catalogues the most-asked-about plants for cats, dogs, and horses.
Avocado care — frequently asked questions
What is the common name for Persea americana?
Persea americana is most commonly called Avocado, but it is also known as Hass avocado, Fuerte avocado, alligator pear. The names refer to the same species, so care instructions for Avocado apply identically to anything sold as alligator pear.
How much light does avocado need?
Avocado grows best in direct sun (at least 4-6 hours). 6-8 hours of direct sun for fruiting trees; bright indirect light for foliage-only indoor pit growers.
How often should I water avocado?
Water avocado when the top 3-5 cm of soil is dry, every 5-10 days. Avocados hate both drought and waterlogging. Deep watering with full drainage. The finger-test (or lifting the pot to feel its weight) beats a fixed weekly calendar because pot size, light, and season all change how fast the soil dries.
Is avocado toxic to cats and dogs?
Avocado is toxic to pets. ASPCA lists Persea americana as toxic to cats, dogs, horses, and especially birds and ruminants, due to persin. Leaves, bark, seed, and skin are most concentrated; the flesh is low-risk for dogs and cats but unsafe for birds and rabbits.
What USDA hardiness zone does avocado grow in?
Avocado is rated for USDA zone 9-11 outdoors and RHS hardiness H2. Outside that range, grow it as a container plant that overwinters indoors before the first hard frost.
Avocado deep-dive guides
Every aspect of avocado care, each with its own calibrated guide:
- Avocado watering schedule
- Avocado light requirements
- Best soil mix for avocado
- Avocado fertilizing guide
- When to repot avocado
- How to propagate avocado
- Avocado growth rate & size
- Avocado cold hardiness
- Avocado temperature & humidity
- Is avocado toxic to cats & dogs?
- Getting avocado to bloom
Related guides
Avocado is also known as Hass avocado, Fuerte avocado, and alligator pear.