I had plans for today, but I didn't ask Mother Nature, whose intentions were somewhat different from mine. And she timed it well. I reached the allotment at 13:45 set to plant up a whole bed of leeks. Then it began to pour with rain. At first a few drops that might have been a passing shower, but it went on for the rest of the afternoon. It's annoying, for we have just had the two best days of the year, rich sunlight, warm temperatures, then rain again. But it mattered little, as I simply went into the greenhouse, a small structure eight feet long and six feet wide, to spend an hour or so doing jobs. As it is six feet high at the ridge it can easily accommodate my five feet seven and a half, so it is a comfortable place to work.
Last year a colleague and I were clearing a plot after its tenant left, when Jeff spotted an abandoned grapevine in a pot, which he gave to me. I had never grown grapes before, so I wondered how to best cultivate it. The greenhouse was the obvious choice, so I gave the grape a pot of its own and placed it in a corner. Over the year it grew, but fruited not,however grapes take time. I did not over-fertilize or over-water, as grapes can cope with drier conditions. But a few weeks ago I spotted buds! The grape was thriving, and it was also trailing, so I rigged up a few loops of string to fasten it to the frame. But today, I spotted them, tiny little clusters of fruit, baby grapes. Now for the next step. A bit of research is going to be needed, for I know that the grape must be pruned, some clusters must go to enable the favoured ones to mature, otherwise they will be small and sour.
But the first job was watering. You must ensure that the plants are well-watered. Tomatoes in particular can suffer from blossom end rot if they are inadequately watered. This is a condition in which the base of some tomatoes has a dry scar-like area replacing the red, moist flesh. There are no fruits yet, but I am taking no chances. I did not apply tomato feed today, as I applied it yesterday, and once a week is enough. But I am going to get some liquid seaweed for the plants, all of them, not just the tomatoes. It is a great fertilizer.
I also trimmed some of the lower shoots of the tomatoes, as you need to control the green growth, as excessive greenery lessens the amount of fruit on the plant. The day's jobs in the greenhouse were completed by some weeding and tidying, as I had been a bit untidy in allowing spare pots to pile up on the floor, so they were tucked away in corners, awaiting someone who wants to give them a good home. Why weed the greenhouse? Not all my floor is paved, and besides the flagstone path I have covered the ground with wood chip,and so some weeds sneak in.Weeds versus humans, an unending battle!
Comments
My greenhouse is a basic design and my allotment site has only just acquired electricity, so I do not use supplemental lighting. I grow at the moment: tomatoes, an eggplant, peppers, a grape vine and courgettes. I am getting another greenhouse when a friend moves on to another allotment, but that will not have supplemental lighting.
frankbeswick, Thank you! Do you just not grow in your greenhouse the plants that have a need for some periods of darkness or for supplemental lighting?
Thanks for this observation. We dwell in very different areas, and yours is far warmer than mine, so your experience will complement my experience. Just to show my situation: tonight 13th May, I am going to have to take anti-frost precautions in the greenhouse after a chilly weather forecast! Heating will have to be used.
You are right. A greenhouse can become too hot, and that's why we need to carefully control the heat,water and air flow.
Pollination can be a problem. That's why I have never grown sweet corn in the greenhouse, as it is wind pollinated and so I cannot rely on the breeze necessary to move the male pollen. A shame really, as sweet corn is always a bit of a challenge where I live, due to our being near its maximum latitude. Keeping a door open in hot,lightly windy weather when bees are operative helps pollination. Large commercial growers often keep bees in each of their greenhouses. I have many bumble bees near my plot, and they are the best pollinators, far better than honey bees
My concern has been with pollination, since bees cannot easily access the plants.
Greenhouses reflect infrared rays, which is why they keep heat in. In this area we can actually get a greenhouse too hot.