I have a small garden, which a large part of is the shade and I have a large range of shade loving plants that are doing really well. I have a large raised planter with lots of plants which is in the sun all the time, and they also are doing well. I purchased a small greenhouse to help, but what I would like to know is this: what is good to grow in greenhouse, flowering wise? I'm not interested in the vegetable side of things yet, but are there any flowering plants I could grow?
Wow, the possibilities here are nearly endless, as greenhouses allow you to grow just about anything your heart desires - year round. Some suggestions that come to mind are hibiscus, orchids, chenille plant, oriental lily, impatiens, calla lily, begonia, passionflower, etc. Here is more information: https://www.gardeningknowhow.com/special/greenhouses/plants-for-greenhouses.htm
Climatic requirement:
1) temperature
2) soil type
intercultural operations:
1) weeding
2) irrigation
3) pest and disease control
4) harvesting technique
Since agronomy refers to the branch of agriculture concerned with crop production and soil management, and production of bean crops - or any crops, since that implies a large harvest - in greenhouse is an area of immense complexity, research, and implications, your question is more appropriate for university study of several years duration, rather than a simple home gardening forum. I can give you a beginners' article, if this addresses any of your interests: https://www.gardeningknowhow.com/special/greenhouses/greenhouse-vegetable-plants.htm
Also one of many many sites that simply list information sites: http://www.agrisk.umn.edu/cache/arl01481.htm
I have an indoor fruiting crop, and I have an out of control powdery mildew problem. I've used Greencure (potassium carbonate), watered, etc. and all seems to slow the process, but the next thing I know it's everywhere again. My air flow is superb, and my humidity is low. I have heard that 'Eagle 20ew' is supposed to be an end all; however, I cannot find a retail dealer. Please help me kill my problem before it ruins my crop.
Try neem oil. Very effective and not harmful to people or animals. Here is more information: https://www.gardeningknowhow.com/problems/pests/neem-oil-uses.htm
I have small whitish worms in the soil in my greenhouse. They are very slim and about a quarter inch long, wiggle a lot when soil is disturbed. They were there last year and burrowed in the root vegetables and made them unusable. They are still there and I want them gone before the veggies start growing. What are they and what should I do to get rid of them?
This could also be your culprit: https://www.gardeningknowhow.com/plant-problems/pests/garden-symphylan-small-white-worm-like-bugs-in-the-soil.htm
I can't tell what they are from the description. Take some samples to a the specialists at the nearest botanical garden, university biology department, or agricultural station.
This is the 2nd year of attempted greenhouse planting/harvesting. However, my problem is having such small yields. I have drip system set for 2 minite watering every other day. My plants are in 2' X 2' diameter barrels. Am I watering too often or too long at a time?
I feel the only way to determine whether or not a plant is getting enough moisture is to check the soil. If the soil is moist to the touch, don't water. If the soil feels dry, water till it runs out the bottom. If you are giving only 2 minutes of water every other day to a 2'x2' container in a greenhouse, the plants should be dry. Since you don't state your location or zone, I'm assuming you are in the US. If so, during the summer, doesn't it get awfully hot in the greenhouse?
Your lack of yield could be simply lack of pollination. Especially in a greenhouse. This article explains: https://www.gardeningknowhow.com/garden-how-to/beneficial/insect-pollination-process.htm
I live in Colorado where it gets very cold during the winter. I am buying a greenhouse to try to grow vegetables year round. However, with the cold winter temperatures I will need to heat the greenhouse. My plan is to build a large compost pile next to the greenhouse, run a hose through the compost pile in a loop, by which the water inside of the hose will heat up. Then I will bring the water into the greenhouse and heat it. Do you think it will work?
That is really hard to say. It depends on how large your greenhouse will be and how large your compost pile will be. My gut says that it likely will not be enough heat unless you have a very small greenhouse though. This article has tips for heating a greenhouse: https://www.gardeningknowhow.com/special/greenhouses/heating-greenhouses.htm
Should cloches have an air gap top prevent over heating. I use them, as I am on a south-facing slope and my garden is usually a month behind others in the same area since my soil is colder. I made mine in an "A" frame shape, as I had some "Polygal" sheets rescued from the tip. They are opaque, not clear. Would this affect the sunlight entry too much?
That should be fine, and yes, if using this material, I would add a small vent in the top. For additional information on using cloches, this article should help: https://www.gardeningknowhow.com/garden-how-to/tools/using-cloches-in-gardens.htm