Fertilising guide
How to fertilise Russian Olive (Elaeagnus angustifolia)— schedule & NPK
Also called Russian olive, Oleaster, Silver berry, Narrow-leaved oleaster.
More about russian olive
About Russian Olive
Elaeagnus angustifolia · also called Russian olive, Oleaster · flowering
Elaeagnus angustifolia is a deciduous, nitrogen-fixing small tree or large shrub native from western and central Asia to the Caucasus and southern Russia, widely naturalised and invasive across the arid western United States. It is supremely tough: drought-tolerant, wind-resistant, and capable of growing in saline and nutrient-poor soils. The most important care fact is that it is classified as a noxious weed in several US states, so check local regulations before planting. The ASPCA does not list it as toxic to pets.
Growth habit: Deciduous small tree or large multi-stemmed shrub with willow-like, silver-green leaves, fragrant yellow flowers in early summer, and olive-like silvery fruits.
What fertiliser russian olive actually wants — and why
Russian Olive 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 russian olive: 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 russian olive, 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 russian olive:
No routine feeding required; nitrogen-fixing root nodules sustain the plant on poor soils; excess fertiliser promotes aggressive growth in this already invasive species. 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 russian olive 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 russian olive
Half strength is the safe default for russian olive — 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 russian olive first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the russian olive watering schedule.
Signs you are over-feeding russian olive
Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for russian olive:
- 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 russian olive
- 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 russian olive care brief covers soil, humidity and the common problems for this species.
Flushing and leaching the salts
Flush the pot of russian olive 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 russian olive
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 russian olive — frequently asked questions
What fertiliser does russian olive 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. Russian Olive 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 russian olive?
No routine feeding required; nitrogen-fixing root nodules sustain the plant on poor soils; excess fertiliser promotes aggressive growth in this already invasive species. No routine feeding required; nitrogen-fixing root nodules sustain the plant on poor soils; excess fertiliser promotes aggressive growth in this already invasive species. 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 russian olive?
Half strength is the safe default for russian olive — houseplant feeds are formulated strong, and the diluted dose is gentler on the roots while still ample for foliage.
What does over-feeding russian olive 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 russian olive 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 russian olive?
Flush the pot of russian olive 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
- Russian Olive care — the full brief (light, soil, humidity, problems, pet safety)
- How often to water russian olive — 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 lesser sea spurrey
- How to fertilise sea heath
- How to fertilise sea knotgrass
- All 10153 fertilising guides in the Growli library