Method for growing plants
The invention relates to a coherent propagation growth substrate product ( 1 ) formed of man-made vitreous fibres (MMVF), the product ( 1 ) having two opposed top and bottom surfaces and at least one cavity ( 2 ) which is open at the top surface and which extends from the top surface towards the bottom surface, wherein a superabsorbent polymer ( 3 ) is provided in the cavity ( 2 ).
1. A method of cultivating plants comprising:
providing a coherent propagation growth substrate product formed of man-made vitreous fibres (MMVF), the product having a top surface which is opposed to a bottom surface and at least one cavity which is open at the top surface and which extends from the top surface towards the bottom surface, wherein the growth substrate product includes a region surrounding the cavity which has a higher density than the remainder of the growth substrate product;
placing, in the at least one cavity, a superabsorbent polymer that is in dry, flowable form;
positioning a seed in the cavity, irrigating the growth substrate product and allowing germination and growth of the seed to form a seedling;
transplanting the seedling by positioning the growth substrate product on the ground; and
irrigating the growth substrate product and allowing growth of the seedling and allowing the seedling to root into the ground.
2. A method according to claim 1 , wherein the depth of the cavity is 20 to 80% of a height of the growth substrate.
3. A method according to claim 1 , wherein a volume of the growth substrate is in the range 3 to 150 cm 3 .
4. A method according to claim 1 , wherein a volume of the growth substrate is in the range 300 to 1500 cm 3 .
5. A method according to claim 1 , wherein a volume of the cavity is 3% to 60% of the volume of the growth substrate.
6. A method according to claim 5 , wherein a volume of the cavity is 10% to 50% of the volume of the growth substrate.
7. A method according to claim 1 , wherein the MMVF has an average density of from 50 to 140 kg/m 3 .
8. A method according to claim 1 , wherein the superabsorbent polymer is in dry granular form.
9. A method according to claim 1 , wherein the at least one cavity extends the entire distance through the height of the growth substrate product and wherein the at least one cavity has a varying cross-sectional area such that the at least one cavity is sufficiently narrow at the bottom of the growth substrate product that the superabsorbent polymer is prevented from falling out of the at least one cavity.