Japanese Pagoda Tree (sophora japonica, also styphnolobium japonicum)

SKU:
£1.25
1.25 8 £1.25 - £8.00
Unavailable
per item

Seed Prices


2 grams (approx 22 seeds) £1.25

5 grams (approx 56 seeds) £1.85

10 grams (approx 112 seeds) £2.25

25 grams (approx 280 seeds) £4.75

50 grams (approx 560 seeds) £8.00

​

Please note that these seeds require pre-treatment before they will germinate -please take note of the information below


*Use the drop down button below to select the quantity

Photo credits
Seed pods -tracy from north brookfield,Massachusetts, usa - Flickr, CC BY 2.0, https://commons.wikimedia.org/w/index.php?curid=389217
Flowers -Fanghong - Own work, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=218252
Tree -Prazak assumed.Own work assumed (based on copyright claims)., CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=995871
​

Germination, Sowing and After Care Information for
​Japanese Pagoda Tree (sophora japonica, also ​styphnolobium japonicum)


Japanese Pagoda Tree seeds have only a very shallow dormancy.

They have a very hard, water-impermeable seed coat and require pre-treatment for successful germination to occur. Without pre-treatment it is likely that many of the seeds will not germinate.

The first (and easiest) method is place the seeds in a heat proof container and pour hot (not boiling!) water 70-80 degrees Celsius over them and leave them to soak for between 12-24 hours. Seeds that have been successfully pre-treated will have swollen to around 3 times their previous size. Remove all swollen seeds as these will be damaged by further pre-treatments. These can be sown immediately. This hot water treatment can be repeated up to 3 times, making the water a little hotter each time. Seeds that remain small will probably not germinate

The remaining method is to physically breakthrough the seed coat by cutting or (k)nicking the edge of the seed with a knife or using a file or even rubbing them between layers of fine sandpaper. All of these methods can be used to break through the seed coat. Once you have done this soak the seeds in cold water for 12-24 hours and successfully treated seeds will have imbibed water and swollen greatly. Any that have not could be scarified again followed by another water soak. 

Sow in pots or seed trays of good quality compost at a depth of about 1 cm (just less than half an inch) The seed usually germinates in 10-14 days at 15-20°c.

Growth in the first year is quite vigorous, usually between 30 and 60cm. 

Plant trees out into their permanent positions after 1 or 2 years growth. Container grown trees can be planted at any time if given sufficient water. Bare rooted specimens should only be transplanted when the tree is fully dormant.