Fertilising guide
How to fertilise Giant Dogwood (Cornus controversa)— schedule & NPK
Also called Giant Dogwood, Table Dogwood, Wedding Cake Tree.
More about giant dogwood
About Giant Dogwood
Cornus controversa · also called Giant Dogwood, Table Dogwood · flowering
Giant dogwood is a large, architecturally striking deciduous tree from East Asia, producing tiered horizontal branches like stacked wedding cake layers. In late spring, flat-topped clusters of small white flowers cover each tier, followed by blue-black fruit and burgundy autumn color. Far larger than other dogwoods, it demands space but is a bold, structural specimen tree of the first order.
Growth habit: Large, broadly spreading deciduous tree with a strongly architectural, tiered horizontal branching pattern. Branches radiate outward in distinct stacked layers, creating the 'wedding cake' silhouette that makes this one of the most structurally distinctive of all garden trees.
What fertiliser giant dogwood actually wants — and why
Giant Dogwood 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 giant dogwood: 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 giant dogwood, 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 giant dogwood:
Feed young trees in spring with a balanced slow-release fertiliser to support establishment and vigorous growth. Mature trees benefit from an annual mulch of compost or leaf mould rather than supplementary fertiliser. Avoid excessive nitrogen, which can produce disproportionately vigorous upright shoots that disrupt the tiered habit. 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 giant dogwood 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 giant dogwood
Half strength is the safe default for giant dogwood — 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 giant dogwood first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the giant dogwood watering schedule.
Signs you are over-feeding giant dogwood
Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for giant dogwood:
- 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 giant dogwood
- 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 giant dogwood care brief covers soil, humidity and the common problems for this species.
Flushing and leaching the salts
Flush the pot of giant dogwood 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 giant dogwood
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 giant dogwood — frequently asked questions
What fertiliser does giant dogwood 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. Giant Dogwood 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 giant dogwood?
Feed young trees in spring with a balanced slow-release fertiliser to support establishment and vigorous growth. Mature trees benefit from an annual mulch of compost or leaf mould rather than supplementary fertiliser. Avoid excessive nitrogen, which can produce disproportionately vigorous upright shoots that disrupt the tiered habit. Feed young trees in spring with a balanced slow-release fertiliser to support establishment and vigorous growth. Mature trees benefit from an annual mulch of compost or leaf mould rather than supplementary fertiliser. Avoid excessive nitrogen, which can produce disproportionately vigorous upright shoots that disrupt the tiered habit. 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 giant dogwood?
Half strength is the safe default for giant dogwood — houseplant feeds are formulated strong, and the diluted dose is gentler on the roots while still ample for foliage.
What does over-feeding giant dogwood 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 giant dogwood 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 giant dogwood?
Flush the pot of giant dogwood 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
- Giant Dogwood care — the full brief (light, soil, humidity, problems, pet safety)
- How often to water giant dogwood — 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 flying saucer cactus
- How to fertilise beavertail cactus
- How to fertilise santa rita prickly pear
- All 8452 fertilising guides in the Growli library