Native & adapted

Miracle fruit

Synsepalum dulcificum

Also known as Miracle berry · Sweet berry · Miraculous berry

A small shrub with red berries that make sour foods taste sweet for an hour or more. A fun container plant that needs acidic soil and low-salt water.

EdibleFruitingContainer friendlyEvergreenFrost tender

Landscape layersUnderstory

Mature size

3–6 ft tall and 2–4 ft wide in a container

Climate fit

Urban core · USDA 9b–10a

Plant spacing

3 ft between pots

Frost

Damaged near 32°F; protect below 40°F.

Special categories

EDIBLE

Hardiness guidance

USDA 10b–11; damaged near 32°F

Winter chill

None

Typical harvest

Fruit forms several times a year after flowering.

Before you plant

These conditions determine whether it will thrive.

Soil chemistry

Needs acidic soil, roughly pH 5 to 6.5. In Phoenix that means a raised bed or large container of acidic potting mix, regular soil sulfur and, ideally, rainwater or filtered water, since tap water is alkaline and salty.

Required microclimate

Placement is part of the growing system.

Container on a shaded patio, brought indoors or covered when nights drop below 40°F.

Cold hardiness

Cover on every frost night

UF/IFAS says established plants get hurt in the low 30s and young ones shouldn't see anything below about 45°F. In Phoenix keep it in a pot and bring it in or under cover any night forecast in the 30s.

Leaves and wood: damaged below 32°F

Heat tolerance

Needs afternoon shade

A humid West African understory shrub, so Phoenix's dry 110°F+ summers are rough on it. Local growers keep it on a shaded patio in summer, never in west sun, and it also needs acidic soil and low-salt water, which our tap water isn't.

Sources:

gardeningsolutions.ifas.ufl.edu , phoenixtropicals.com

Right plant, right place

Will Miracle fruit grow at your Arizona property?

Grow it in a pot of peat-based acidic mix. It grows slowly and rarely needs repotting.

Best regional fit: Urban core · USDA 9b–10a.

Light

Sun exposure

Bright filtered light or morning sun only.

Water

Irrigation

Keep evenly moist with rainwater or filtered water. Phoenix tap water slowly poisons it with salts.

Fruit set

Pollination

Self-fertile.

Harvest

How to use it

Chew a berry, then taste lemons, vinegar or sour fruit; they taste sweet for a while.

Planting & stewardship

How to help Miracle fruit thrive

1
Use an acid-loving plant fertilizer at half strength.
2
Water with rainwater, filtered or reverse osmosis water.
3
Keep it out of direct afternoon sun.
4
Move it under cover on cold nights.

Read the horticultural reference ↗