Fertilising guide
How to fertilise Jaboticaba (Myrciaria cauliflora)— schedule & NPK
Also called Jaboticaba, Brazilian Grape Tree, Jabuticaba.
More about jaboticaba
About Jaboticaba
Myrciaria cauliflora · also called Jaboticaba, Brazilian Grape Tree · tropical
Jaboticaba is a remarkable Brazilian fruit tree that produces dark purple, grape-like fruits directly on its trunk and main branches (cauliflory). Eaten fresh or made into wine, jellies, and liqueurs, it is prized in Brazilian horticulture. It is slow-growing, requires acidic, moist, fertile soil, and thrives in warm subtropical to tropical climates with high humidity.
Growth habit: Slow-growing, multi-branched evergreen tree with smooth, attractive exfoliating bark; cauliflorous fruiting on trunk and main branches
Watch for — Very slow growth frustrating growers: Jaboticaba is one of the slowest tropical fruit trees, often taking 8–15 years to fruit from seed. While this is a natural characteristic rather than a problem, ensuring optimal acidic, moist, fertile conditions and consistent care maximises the growth rate. Grafted or air-layered specimens fruit much sooner (2–4 years).
What fertiliser jaboticaba actually wants — and why
Jaboticaba is an acid-loving plant — it can only take up nutrients in acidic soil, so the feed itself matters less than using an ericaceous formula and never liming.
An ericaceous (acidic) fertiliser, formulated to keep the soil pH low and supply iron and trace elements in a form acid-loving roots can absorb. Ordinary feeds and any lime lock out iron and yellow the leaves.
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 jaboticaba: 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 jaboticaba, 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 jaboticaba:
Apply an acidic slow-release fertiliser formulated for camellias or blueberries (high sulphur, iron, and manganese) 3–4 times per year during the growing season. Supplement with chelated iron if interveinal chlorosis appears. Avoid high-phosphorus fertilisers which can lock out micronutrients in acidic soils. Organic acidic mulch (pine bark, coffee grounds) applied annually maintains pH and feeds the root zone. In practice: an ericaceous feed in spring as growth resumes, repeated through the main growing months; never apply lime, bonemeal or wood ash, which raise pH.
The dormant-season rule matters more than the exact interval: skip feeding entirely when jaboticaba 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 jaboticaba
Follow the ericaceous product's own rate — these are formulated for the plant, so the dilution on the label is right for jaboticaba. The variable that actually matters is pH, not concentration.
Feeding always goes onto already-damp soil, never dry roots — water jaboticaba first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the jaboticaba watering schedule.
Signs you are over-feeding jaboticaba
Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for jaboticaba:
- Brown, scorched leaf margins from too strong or too frequent a dose.
- White salt crust on the soil surface.
- Soft, lush growth that fruits or flowers poorly.
Signs you are under-feeding jaboticaba
- Yellowing leaves with green veins (iron chlorosis from high pH).
- Weak growth, poor cropping and an overall pale, stressed look.
- Stunted new shoots in spring despite adequate water and light.
If the symptoms point at watering, light or roots rather than nutrition, the full jaboticaba care brief covers soil, humidity and the common problems for this species.
Flushing and leaching the salts
Flush jaboticaba with rainwater (not hard tap water, which raises pH) if salts build up; better still, mulch with pine needles or composted bark and water with rainwater to hold the acidity.
Organic vs synthetic feeds for jaboticaba
Organic options
Composted pine bark, pine-needle mulch, used coffee grounds and an organic ericaceous feed gently maintain acidity. UK: Vitax or Westland Ericaceous; US: Espoma Holly-tone or Dr. Earth Acid Lovers. Slow, soil-improving, hard to overdo.
Synthetic / liquid feeds
A liquid or granular ericaceous feed — UK: Miracle-Gro Ericaceous, Vitax or Westland; US: Miracle-Gro Acid-Loving Plant Food or Espoma Holly-tone. Pair with rainwater and an acidic mulch for it to work.
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 jaboticaba — frequently asked questions
What fertiliser does jaboticaba need?
An ericaceous (acidic) fertiliser, formulated to keep the soil pH low and supply iron and trace elements in a form acid-loving roots can absorb. Ordinary feeds and any lime lock out iron and yellow the leaves. Jaboticaba is an acid-loving plant — it can only take up nutrients in acidic soil, so the feed itself matters less than using an ericaceous formula and never liming.
How often should I feed jaboticaba?
Apply an acidic slow-release fertiliser formulated for camellias or blueberries (high sulphur, iron, and manganese) 3–4 times per year during the growing season. Supplement with chelated iron if interveinal chlorosis appears. Avoid high-phosphorus fertilisers which can lock out micronutrients in acidic soils. Organic acidic mulch (pine bark, coffee grounds) applied annually maintains pH and feeds the root zone. Apply an acidic slow-release fertiliser formulated for camellias or blueberries (high sulphur, iron, and manganese) 3–4 times per year during the growing season. Supplement with chelated iron if interveinal chlorosis appears. Avoid high-phosphorus fertilisers which can lock out micronutrients in acidic soils. Organic acidic mulch (pine bark, coffee grounds) applied annually maintains pH and feeds the root zone. In practice: an ericaceous feed in spring as growth resumes, repeated through the main growing months; never apply lime, bonemeal or wood ash, which raise pH.
What strength of feed for jaboticaba?
Follow the ericaceous product's own rate — these are formulated for the plant, so the dilution on the label is right for jaboticaba. The variable that actually matters is pH, not concentration.
What does over-feeding jaboticaba look like?
Brown, scorched leaf margins from too strong or too frequent a dose. White salt crust on the soil surface. Soft, lush growth that fruits or flowers poorly. Feeding jaboticaba an ordinary fertiliser, or growing it in hard tap water / limey soil, is the defining mistake — it triggers lime-induced chlorosis (yellow leaves, green veins) no amount of feeding fixes until the pH comes down.
Should I flush the soil of jaboticaba?
Flush jaboticaba with rainwater (not hard tap water, which raises pH) if salts build up; better still, mulch with pine needles or composted bark and water with rainwater to hold the acidity.
Keep reading
- Jaboticaba care — the full brief (light, soil, humidity, problems, pet safety)
- How often to water jaboticaba — 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 sonerila margaritacea
- How to fertilise sonerila heterostemon
- How to fertilise bertolonia maculata
- All 8452 fertilising guides in the Growli library