Plant care
Woodruff (master of the wood) care
Galium odoratum
Also called sweet woodruff, woodruff, master of the wood.
Watering rhythm
5-7days
Keep soil consistently moist; water roughly every 5-7 days in dry weather
Light
Low light (north window or shaded room)
Soil
Moist, humus-rich woodland soil
Humidity
Ambient outdoor
Temp
5-21°C
Pet safety
Mildly toxic to pets
Mature size
15-30 cm tall
Care at a glance
Light
Most houseplants sulk in a dim corner. Woodruff is one of the handful that doesn't. A true shade plant that thrives in partial to full shade. Foliage scorches and growth thins in direct sun, so it is happiest beneath trees and on the shady side of buildings. The tell that you've pushed even a low-light plant too far is soil that stays wet for a week — the plant has stopped transpiring, which means it's stopped using water, which is one short step from rot.
Watering
Water woodruff keep soil consistently moist; water roughly every 5-7 days in dry weather. The actual day count varies with pot size, light, and season — the finger test (or lifting the pot to feel its weight) is more reliable than a fixed calendar. Empty any drainage saucer afterwards so the pot isn't sitting in water. A woodland-floor species that resents drying out. Even moisture keeps the carpet lush; prolonged drought turns foliage brown and crisp at the edges.
Soil and pot
Woodruff grows best in moist, humus-rich woodland soil. Loves leaf-mould-rich, moisture-retentive soil. Add compost or leaf mould to improve any thin ground. Tolerates a range of pH but performs best in cool, evenly moist conditions. 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
Woodruff sits happiest at around Ambient outdoor humidity and 5-21°C (41-70°F). Enjoys the cool, moist air of shaded, sheltered gardens; an outdoor groundcover with no special humidity needs beyond a damp, shady situation. If you keep the room above 5 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 woodruff sparingly. Rarely needs feeding in decent woodland soil. An annual spring mulch of leaf mould or garden compost keeps the carpet vigorous; avoid heavy fertiliser, which is unnecessary. 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 woodruff in the Growli community. Each is annotated with the most common cause so you know where to start.
- Aggressive spreading — Vigorous rhizomes can overrun neighbouring plants in moist shade; use a barrier or site where it can roam freely.
- Scorch in sun and drought — Foliage browns in direct sun or dry soil; move to shade and keep the ground consistently moist.
- Summer dieback when dry — Hot, dry spells cause the carpet to go dormant and brown; deep mulch and watering keep it green for longer.
- Thinning in deep dry shade — Dry shade under thirsty trees gives sparse cover; improve soil with leaf mould and water during establishment.
Propagation
Simplest by division in spring or autumn, lifting and replanting rooted rhizome sections. It can also be grown from seed, though germination is slow and erratic. 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
Woodruff is mildly toxic to pets. Not individually listed by the ASPCA; treat with caution and verify with a vet. Sweet woodruff contains coumarin, which in large amounts can affect the liver and clotting, particularly in dogs. Risk from casual nibbling is generally low, but because the ASPCA does not confirm it as non-toxic, do not label it pet-safe. 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.
Woodruff care — frequently asked questions
What is the common name for Galium odoratum?
Galium odoratum is most commonly called Woodruff, but it is also known as sweet woodruff, woodruff, master of the wood. The names refer to the same species, so care instructions for Woodruff apply identically to anything sold as master of the wood.
How much light does woodruff need?
Woodruff grows best in low light (north window or shaded room). A true shade plant that thrives in partial to full shade. Foliage scorches and growth thins in direct sun, so it is happiest beneath trees and on the shady side of buildings.
How often should I water woodruff?
Water woodruff keep soil consistently moist; water roughly every 5-7 days in dry weather. A woodland-floor species that resents drying out. Even moisture keeps the carpet lush; prolonged drought turns foliage brown and crisp at the edges. 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 woodruff toxic to cats and dogs?
Woodruff is mildly toxic to pets. Not individually listed by the ASPCA; treat with caution and verify with a vet. Sweet woodruff contains coumarin, which in large amounts can affect the liver and clotting, particularly in dogs. Risk from casual nibbling is generally low, but because the ASPCA does not confirm it as non-toxic, do not label it pet-safe.
What USDA hardiness zone does woodruff grow in?
Woodruff is rated for USDA zone 4-8 (outdoor groundcover) and RHS hardiness H6. Outside that range, grow it as a container plant that overwinters indoors before the first hard frost.
Woodruff deep-dive guides
Every aspect of woodruff care, each with its own calibrated guide:
- Woodruff watering schedule
- Woodruff light requirements
- Best soil mix for woodruff
- Woodruff fertilizing guide
- When to repot woodruff
- How to propagate woodruff
- Woodruff growth rate & size
- Woodruff cold hardiness
- Woodruff temperature & humidity
- Is woodruff toxic to cats & dogs?
- Is woodruff toxic to cats?
- Is woodruff toxic to dogs?
Related guides
Woodruff is also known as sweet woodruff, woodruff, and master of the wood.