Having asked for help in growing seeds and plants for planting in Brighouse we thought it might be helpful if we explained what seeds require for successful germination. Germination is the growth of an embryonic plant contained within a seed; it results in the formation of the seedling. All fully developed seeds contain an embryo and, in most plant species some store of food reserves, wrapped in a seed coat. Mature seeds are often extremely dry and need to take in significant amounts of water before cellular metabolism and growth can resume. Most seeds need enough water to moisten the seeds but not enough to soak them. Oxygen is used in aerobic respiration, the main source of the seedling's energy until it grows leaves. Oxygen is an atmospheric gas that is found in soil pore spaces; if a seed is buried too deeply within the soil or the soil is waterlogged, the seed can be oxygen starved. Some seeds have impermeable seed coats that prevent oxygen from entering the seed, causing a type of physical dormancy which is broken when the seed coat is worn away enough to allow gas exchange and water uptake from the environment. Seeds from different species and even seeds from the same plant germinate over a wide range of temperatures. Seeds often have a temperature range within which they will germinate, and they will not do so above or below this range. Many seeds germinate at temperatures slightly above room-temperature 60-75 F (16-24 C), while others germinate just above freezing and others germinate only in response to alternations in temperature between warm and cool. Light levels can be an environmental trigger for germination and is a type of physiological dormancy. Most seeds are not affected by light or darkness, but many seeds, including species found in forest settings, will not germinate until an opening in the canopy allows sufficient light for growth of the seedling The first leaves of a plant are those formed in the seed, and which may or may not rise above-ground during germination. Those of the Cabbage, Mustard ,Beech, and Onion rise above-ground and become green. As soon as this has taken place the seedling has started life on its own account, manufacturing its own food in the green seed leaves and stem. Happy seed sowing!