Scotch Laburnum (laburnum alpinum)
SKU:
£1.95
£1.35 - £16.00
per item
Seed Prices
1 gram (approx 23 seeds) £1.35
2 grams (approx 47 seeds) £1.95
5 grams (approx 95 seeds) £4.00
10 grams (approx 190 seeds) £7.50
25 grams (approx 475 seeds) £16.00
Please note that these seeds require pretreatment before they will germinate -please take note of the information below
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Germination, Sowing and After Care information for
Scotch Laburnum (laburnum alpinum)
Although Laburnum seeds have only a very shallow dormancy they have a very hard, water-impermeable seed coat and require pretreatment for successful germination to occur. Without pretreatment it is likely that 10% or less of the seeds will germinate. A combination of a variety of seed pretreatments is usually necessary to make the seed coat permeable so that the seed embryo can take up water and begin to 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 pretreated will have swollen to around 3 times their previous size. Remove all swollen seeds as these will be damaged by further pretreatments. 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 need to be dried for further treatment.
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 all the seeds, even those that remain small as they may germinate much later (perhaps years later), the seeds are very long lived and can remain viable in the field for 30 years.
Sow in pots or seed trays of good quality compost at a depth of about 2cm (just less than 1 inch) The seed usually germinates in under 4 weeks at 15-20°c. It is important that temperatures or not greatly higher than this or germination will be reduced. Growth in the first year is modest, usually between 20 and 40cm.
Plant trees out into their permanent positions after 2 or 3 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.
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 pretreated will have swollen to around 3 times their previous size. Remove all swollen seeds as these will be damaged by further pretreatments. 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 need to be dried for further treatment.
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 all the seeds, even those that remain small as they may germinate much later (perhaps years later), the seeds are very long lived and can remain viable in the field for 30 years.
Sow in pots or seed trays of good quality compost at a depth of about 2cm (just less than 1 inch) The seed usually germinates in under 4 weeks at 15-20°c. It is important that temperatures or not greatly higher than this or germination will be reduced. Growth in the first year is modest, usually between 20 and 40cm.
Plant trees out into their permanent positions after 2 or 3 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.
