Satsuki azalea 'Yata-no-kagami'

Satsuki azalea 'Yata-no-kagami' key facts

Growing Difficulty

Beginner-friendly

Lifespan

Little data for the cultivar

Size

Satsuki is an evergreen shrub of about 0.5–1 m; as bonsai it is trained to suit the pot

Watering

Fertilizer (April, June after flowering, Sept–Oct)

Light & placement

Likes light, but summer sun scorches leaves and roots. Give young plants full sun; keep finished trees in part shade, always with good airflow

Watering

Likes water but its fine roots rot if waterlogged: 1–2 times daily in spring, 2–3 in summer, every 2–3 days in winter. Avoid watering in the midday heat

Temperature & overwintering

Reasonably hardy but dislikes cold winter wind; keep the pot from freezing under eaves or similar

Soil & repotting

Coarse, acidic kanuma-based mix. Repot right after flowering (June) or in autumn (late Sep–early Oct)

Fertilizer

Solid fertilizer about April as new leaves harden, after flowering in June, and monthly in Sep–Oct. Underfeeding causes dieback

Pruning & styling

Flower buds form in July to mid-August, so finish pinching and pruning in June (early July west of Kanto). Wire in April and Sep–Oct

Pests & cautions

Especially pest-prone: lace bugs, spider mites, aphids and thrips are common, so regular control is needed in the growing season

About Satsuki azalea 'Yata-no-kagami'

Yata-no-kagami is a classic Satsuki azalea bonsai variety with deep red blooms marked by a large white blotch. Vigorous and easy to shape, it's a popular pick for beginners.

7 things to know before growing Satsuki azalea 'Yata-no-kagami'

1. 1Placement & Light

   From spring through autumn, keep the tree outdoors in a spot with plenty of sun and good air circulation to encourage strong flowering. In summer, strong direct sun can scorch the leaves, so move the pot to partial shade or use a shade cloth. In winter, protect it from frost and cold winds under eaves or similar shelter.

2. 2Watering

   Satsuki azaleas have fine roots that dry out easily, so water thoroughly once the soil surface feels dry. In summer the soil dries faster, so watering morning and evening is a good guideline. From summer onward, when flower buds are forming, be careful not to let the soil dry out completely.

3. 3Soil

   Satsuki azaleas prefer acidic soil, so a well-draining, moisture-retentive mix based on kanuma soil suits them well. Using ordinary potting soil as-is can push the mix toward alkaline and lead to poor growth, so it's best avoided.

4. 4Repotting Timing

   The best time to repot is right after flowering ends in early summer. Avoid breaking up the root ball too much — trimming only damaged roots helps keep growth and next year's flowering stable. Repotting every two to three years, rather than annually, is a good rule of thumb.

5. 5Post-Bloom Pruning

   Remove spent blooms as soon as possible after flowering, then prune to shape the tree. If pruning is delayed, you risk cutting off next year's flower buds, so aim to finish this work within two to three weeks of the flowers fading.

6. 6Choosing a Plant

   Individual Yata-no-kagami trees can vary noticeably in how the white blotch appears and how deep the red coloring is. Choosing a listing with photos of actual blooms and the tree's shape makes it easier to picture the flower pattern and styling direction you want. Look for glossy leaves and healthy growth all the way to the branch tips.

7. 7Autumn Color, Too

   Yata-no-kagami has thick, glossy leaves that turn a beautiful red in autumn, so there's something to enjoy even outside the flowering season. The colored leaves often stay on the tree rather than dropping right away, making it pleasant to view the tree's form through winter while waiting for the next bloom.

Frequently asked questions about Satsuki azalea 'Yata-no-kagami'

Q.Can beginners grow Yata-no-kagami?

A.Yes — Yata-no-kagami is considered an easy-to-handle Satsuki azalea thanks to its vigorous growth and readily extending branches. As long as you cover the basics of sunlight and watering, it's manageable even for someone new to bonsai.

Q.When does it typically bloom?

A.Yata-no-kagami is an early-blooming Satsuki variety. It bears rounded, medium-sized deep red flowers with a white blotch at the center. Exact timing varies with each year's weather and where the plant is kept.

Q.Does the white blotch always look the same?

A.No — the size and pattern of the white blotch vary from flower to flower and from tree to tree. Even the same tree can show a different look from year to year, which is part of the appeal of growing this variety.

Q.Can a beginner shape the tree's form?

A.Because Yata-no-kagami's branches extend readily, you can gradually shape the tree through ongoing bud pinching and post-bloom pruning. It helps to approach styling patiently, over several years rather than all at once.

Q.Can it be grown indoors?

A.Yata-no-kagami prefers an outdoor spot with good sun and airflow, so outdoor care is generally best. If you bring it indoors briefly to enjoy the blooms, return it to a bright outdoor location as soon as possible.

Handy Growing Tools for Satsuki azalea 'Yata-no-kagami'

Learn more about Satsuki azalea 'Yata-no-kagami' in the encyclopedia

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