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When sjould seed be planted indoors in the middle of winter, it will not germinate for a few weeks. Thus, the cold temprature provided by the seedling heat mat is so important. I usually go outside in mid January and transplant 10-15" seedlings and start them in a 5" frame, using a mix of 3 parts pumice, 1 part peat, 1 part sand and 1 part vermiculite. We run the high heat mat and the temp in the frame gets to 70-75F (21-24C) in 3 days. We then remove the seedling heat mats and plant the seedlings in peat pots or flat and cover with a clear plastic domar. The next step is to do a dormant house that is 40F (4C) and 100% humidity for a couple of months and allow the seedlings to become established and then transplant them out in late May into the garden. For fast growing cold hardy plants, put them in the greenhouse (inside a cold frame if possible) during the winter and grow them there to a flowering size. Try to grow them to maturity in a cold frame, if possible, otherwise use a grow tent with cold frames inside.
You can keep seedlings in the house by putting a newspaper in a box and putting a bellows heater on it. Do not cover the plants with fleece or cellophane. Give them some hot water at a regular interval for 1-2 weeks.
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Plant Enthusiast: Great Fall Planting Guide: Fall Planting for Succession
The soil around your house must be planted with spring bulbs, bulbs in fall, lettuce, radishes, spinach and other cool weather crop this year. Get started now on fall planting of perennial, shrub and flowering plants to put a final stroke on the fall garden.
The Greenhouse: A Garden Room on a Budget - #11437:by Dave Hodges and this link leads to a total of 2,138 related articles and dozens of great articles, including lots of planting advice:
Let me get this straight - anyone can grow anything in a home greenhouse, with the exception of several plant families?
In order for your seed to germinate, it has to be warmed up to its germination temperature. Without this, the seed won't germinate, period. But is the surrounding air temperature the one that is going to be vital to its success? Maybe, maybe not. Maybe, the only reason some seeds do not germinate is because of pollination issues that the actual climate may not present. But then, maybe there is something in the seed or just something in the surrounding air that promotes better germination. This will be determined only by how we have to rephrase this question. And perhaps, perhaps, it will not even be determined by the temperature in your greenhouse, but instead by the pollination ability of the neighboring plants.
Now, the greenhouse that you are in might be set up in such a way that it is providing heat from a heater to the plants. And if this is the case, then that is going to be important, and one should adjust the heater accordingly to make sure that it is keeping the temperature just right. But that is not all that is important about it. The very temperature inside of the greenhouse, and to a large degree, the greenhouse itself is just a container. What does the container do to make sure that the plants get the proper microenvironment (humidity, light, air flow, soil type and condition) that they need for germination to take place? There is no doubt that the container does provide the microenvironment in which these things take place.But does the container itself create that microenvironment, or is it the air inside of it? And is the container itself doing a good job? Or is it the heater and the heater settings? The plants can only succeed if the proper environment is being created for them, and while the greenhouse is performing its job, it is only as good as the operation of the heater and its settings. One cannot take the air outside the greenhouse and think that it will be the same as if it was inside. In fact, unless the air outside the greenhouse is the same as the air inside, then it is almost certain that the plants are not going to do well.
Now, the root system of the plant will have a certain dynamic of its own. The problem is that the root system does not have a sense of “wellness” or “unwellness”, nor does it have a sense of “good” or “bad” or “just okay”. It just has to go with the dynamic of the plants. And we are looking at it from the standpoint of the soil inside of the root system. The soil inside of the root system is, well, the air inside of the root system. If the air is a carbon dioxide enriched atmosphere, it is going to suck the plant down into the soil. So the air inside of the root system needs to be a carbon dioxide poor environment. But if the air is a nitrogen rich atmosphere, the plant is going to try to lift itself out of the soil to get more air. And this means that there will need to be a lot of carbon dioxide-poor air inside of the root system.
So the first thing that needs to happen is that the environment has to be made suitable for the growth of the root system. This means that the root