Fertilising guide

How to fertilise Sihong Jujube (Ziziphus jujuba 'Sihong')— schedule & NPK

Also called Sihong jujube.

More about sihong jujube

About Sihong Jujube

Ziziphus jujuba 'Sihong' · also called Sihong jujube · edible

'Sihong' is a Chinese jujube cultivar grown for large, sweet, crisp fruit excellent fresh, named for the Sihong region. A heat- and drought-tolerant deciduous tree, it crops reliably in hot summers and poor, alkaline soils where other fruit fails. Like most jujubes it is partially self-fertile but fruits more heavily with a second cultivar for cross-pollination.

Growth habit: Upright, vigorous deciduous tree with glossy leaves and characteristic zigzag branching; suckers from the roots. Leafs out and flowers late, with small fragrant yellow-green flowers borne over a long period.

Watch for — Lighter crops grown alone: Though partially self-fertile, yields improve markedly with a second cultivar such as 'Li' or 'Lang' nearby for cross-pollination.

What fertiliser sihong jujube actually wants — and why

Sihong Jujube feeds in two distinct phases — balanced to build the plant, then high-potassium the moment flowering starts to set and fill a heavy crop.

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 sihong jujube: 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 sihong jujube, 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 sihong jujube:

Light feeder needing only a spring dose of balanced fertiliser or compost. Jujubes crop well in lean soil; avoid heavy nitrogen, which drives suckering and foliage over fruit. So: a balanced feed or compost at planting, then a high-potash liquid every 1-2 weeks from first flower through harvest across the main season (spring through early autumn).

The dormant-season rule matters more than the exact interval: skip feeding entirely when sihong jujube 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 sihong jujube

Follow the crop-feed label rate for sihong jujube — these are calibrated for hungry vegetables. Consistency through fruiting matters more than strength; erratic feeding causes problems like blossom-end rot.

Feeding always goes onto already-damp soil, never dry roots — water sihong jujube first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the sihong jujube watering schedule.

Signs you are over-feeding sihong jujube

Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for sihong jujube:

Vigorous dark-green leafy growth but few flowers or fruit (excess nitrogen).
Lush foliage hiding the crop; soft growth prone to pests and disease.
Salt crust on the soil and scorched leaf edges in containers.

Signs you are under-feeding sihong jujube

Pale, yellowing lower leaves and stunted growth.
Small fruit, poor set, and a quickly exhausted plant.
Blossom-end rot and weak cropping from erratic or insufficient feeding.

If the symptoms point at watering, light or roots rather than nutrition, the full sihong jujube care brief covers soil, humidity and the common problems for this species.

Flushing and leaching the salts

In containers, fertiliser salts build up fast — water sihong jujube thoroughly so excess drains from the base each time, and flush pots with plain water every few weeks to prevent a damaging salt build-up.

Organic vs synthetic feeds for sihong jujube

Organic options

Garden compost or well-rotted manure dug in before planting, plus a liquid comfrey or seaweed feed once fruiting starts. UK: comfrey feed or organic Tomorite; US: Espoma Tomato-tone or Neptune's Harvest. Builds soil and feeds in one.

Synthetic / liquid feeds

A balanced feed at planting then a high-potash tomato feed in fruiting — UK: Growmore at planting then Tomorite (Levington) or Phostrogen; US: a balanced 10-10-10 then Miracle-Gro Tomato or a bloom booster.

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 sihong jujube — frequently asked questions

What fertiliser does sihong jujube need?

Balanced (even N-P-K) at planting for roots and frame, then switch to a high-potassium ("high-potash") tomato-style feed once the first flowers open — potassium is what sizes and ripens fruit, not nitrogen. Sihong Jujube feeds in two distinct phases — balanced to build the plant, then high-potassium the moment flowering starts to set and fill a heavy crop.

How often should I feed sihong jujube?

Light feeder needing only a spring dose of balanced fertiliser or compost. Jujubes crop well in lean soil; avoid heavy nitrogen, which drives suckering and foliage over fruit. Light feeder needing only a spring dose of balanced fertiliser or compost. Jujubes crop well in lean soil; avoid heavy nitrogen, which drives suckering and foliage over fruit. So: a balanced feed or compost at planting, then a high-potash liquid every 1-2 weeks from first flower through harvest across the main season (spring through early autumn).

What strength of feed for sihong jujube?

What does over-feeding sihong jujube look like?

Vigorous dark-green leafy growth but few flowers or fruit (excess nitrogen). Lush foliage hiding the crop; soft growth prone to pests and disease. Salt crust on the soil and scorched leaf edges in containers. Staying on a high-nitrogen feed once sihong jujube starts flowering is the classic error — you get a huge leafy plant and a disappointing crop. Switch to high-potash the moment flowers appear.

Should I flush the soil of sihong jujube?