Fertilising guide
How to fertilise Bitterroot (Lewisia rediviva)— schedule & NPK
Also called Bitterroot, Resurrection Plant, Tobacco Root.
More about bitterroot
About Bitterroot
Lewisia rediviva · also called Bitterroot, Resurrection Plant · flowering
The state flower of Montana, Lewisia rediviva is a striking deciduous alpine wildflower bearing large, showy pink to white flowers in late spring on bare ground, long after the narrow, succulent winter leaves have withered. Completely summer-dormant, it requires desert-dry conditions after bloom and is exceptionally cold-hardy but intolerant of summer moisture.
Growth habit: Deciduous, rosette-forming perennial with a large fleshy taproot; fully summer-dormant
What fertiliser bitterroot actually wants — and why
Bitterroot is an easy, light foliage feeder — a half-strength balanced liquid feed through the growing months keeps it green without forcing weak, sappy growth.
A balanced general houseplant feed (roughly even N-P-K) is exactly right — it is grown for foliage, so steady, moderate nitrogen for healthy leaves is the goal, not a bloom or root formula.
For the language behind the three numbers on the bottle — what nitrogen, phosphorus and potassium each do — see the NPK ratio explained entry. The short version for bitterroot: match the feed to the job the plant is doing right now, not to a generic “plant food” on the shelf.
How often to feed bitterroot, and which months
Feeding only earns its keep while the plant is in active growth and can use the nutrients — pour feed into a dormant or low-light plant and it simply builds up as root-burning salt. For bitterroot:
No fertiliser needed or desired. Nutrient-poor substrate is essential for authentic performance. Any supplemental feeding risks promoting soft, disease-prone growth. Treat that as sparingly through the growing season between spring through early autumn (roughly March to September); ease off in autumn and stop entirely in the low light of winter.
The dormant-season rule matters more than the exact interval: skip feeding entirely when bitterroot is resting. For the wider context on indoor feeding rhythms across the seasons, the houseplant fertiliser schedule walks through the year month by month.
What strength to mix for bitterroot
Half strength is the safe default for bitterroot — houseplant feeds are formulated strong, and the diluted dose is gentler on the roots while still ample for foliage.
Feeding always goes onto already-damp soil, never dry roots — water bitterroot first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the bitterroot watering schedule.
Signs you are over-feeding bitterroot
Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for bitterroot:
- Brown, crispy leaf tips and edges with no sign of underwatering.
- A white, crusty salt deposit on the soil surface or pot rim.
- Weak, pale, stretched new growth that flops.
- Lower leaves yellow and drop while the soil is correctly watered.
Signs you are under-feeding bitterroot
- Uniformly pale or yellow-green leaves, oldest first.
- Noticeably small new leaves and stalled growth in good light and season.
- A generally tired, lacklustre look despite correct watering and light.
If the symptoms point at watering, light or roots rather than nutrition, the full bitterroot care brief covers soil, humidity and the common problems for this species.
Flushing and leaching the salts
Flush the pot of bitterroot with plain water until it runs freely from the base every couple of months in the feeding season — it washes out the fertiliser salts that cause brown tips.
Organic vs synthetic feeds for bitterroot
Organic options
A diluted seaweed or worm-casting feed, or fish emulsion if you can tolerate the smell indoors. UK: Westland or Baby Bio Organic, dilute seaweed; US: Espoma Indoor! or Neptune's Harvest fish & seaweed. Slow, gentle and hard to overdo.
Synthetic / liquid feeds
A general-purpose houseplant liquid at half strength — UK: Baby Bio, Westland Houseplant Feed or Phostrogen; US: Miracle-Gro Indoor Plant Food or Schultz. Convenient and fast-acting; the only risk is overdoing it.
Brand names are examples, not endorsements, and UK and US ranges differ — check the label’s own NPK and dilution rate, since formulations change.
Fertilising bitterroot — frequently asked questions
What fertiliser does bitterroot need?
A balanced general houseplant feed (roughly even N-P-K) is exactly right — it is grown for foliage, so steady, moderate nitrogen for healthy leaves is the goal, not a bloom or root formula. Bitterroot is an easy, light foliage feeder — a half-strength balanced liquid feed through the growing months keeps it green without forcing weak, sappy growth.
How often should I feed bitterroot?
No fertiliser needed or desired. Nutrient-poor substrate is essential for authentic performance. Any supplemental feeding risks promoting soft, disease-prone growth. No fertiliser needed or desired. Nutrient-poor substrate is essential for authentic performance. Any supplemental feeding risks promoting soft, disease-prone growth. Treat that as sparingly through the growing season between spring through early autumn (roughly March to September); ease off in autumn and stop entirely in the low light of winter.
What strength of feed for bitterroot?
Half strength is the safe default for bitterroot — houseplant feeds are formulated strong, and the diluted dose is gentler on the roots while still ample for foliage.
What does over-feeding bitterroot look like?
Brown, crispy leaf tips and edges with no sign of underwatering. A white, crusty salt deposit on the soil surface or pot rim. Weak, pale, stretched new growth that flops. Lower leaves yellow and drop while the soil is correctly watered. Feeding bitterroot year-round on a fixed schedule, including dark winter months, is the most common mistake — it cannot use the nutrients in low light and the surplus simply burns the roots and crusts the soil.
Should I flush the soil of bitterroot?
Flush the pot of bitterroot with plain water until it runs freely from the base every couple of months in the feeding season — it washes out the fertiliser salts that cause brown tips.
Keep reading
- Bitterroot care — the full brief (light, soil, humidity, problems, pet safety)
- How often to water bitterroot — the watering schedule
- The houseplant fertiliser schedule — feeding through the year
- NPK ratio explained — what the three numbers on the bottle mean
- How to fertilise cupcake miniature rose
- How to fertilise loving touch miniature rose
- How to fertilise sweet chariot miniature rose
- All 8452 fertilising guides in the Growli library