I will probably write a lot about my gardening adventures this year, both because I will do a lot of experimental stuff and also because I think there should be something to read on the FtB that is not entirely serious, especially in these serious times.

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The crocuses started to poke their heads out of the ground, and the garlic too. I only took a picture of the first crocus, the garlic is more useful but less interesting. I haven’t seen any starlings yet, so the time is not entirely up to plant potatoes. But I have seen first bumblebees searching for nesting places and also first butterflies (probably tortoiseshells or some other Nymphalid species that overwinters).

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I used the warm and sunny days to plant my first outdoor crop of this season – spinach. I have never tried to grow spinach so I do not know how it will do. I do hope it will do well. The packet said to plant rows 15 cm apart and space the seeds 6 cm within the rows. I changed that to a hexagonal pattern of approximately 10 cm apart. I like planting in hexagonal patterns because it covers the space better and allows the plants to grow more evenly in all directions. It is more difficult to weed, but I generally do not bother with weeding after a certain time because I do not have the time and strength for it anyway. The ground here was covered with woodchips over the winter, I raked those aside for planting and after the spinach plants poke out of the ground, I will put them back as mulch and weed suppression.

I have sown approximately 5 sqm with spinach and we shall see what comes out of it. After the first batch is harvested, I will continue with the second row of spinach, the soil should be rich enough in nitrogen to handle it, it is nearly pure old compost. And it is right next to the coppice so it will be in the shade at noon time during the summer, which should work well for spinach. I hope. Like I said, this is my first time.

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The radishes in the greenhouse came out of the ground nicely, it looks promising so far. I will wait a few more days and I will sow the second packet of seeds nearby.

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And this is the title of this article.  I know there ain’t such a verb as “to massivate” but I made it up for what I did here – I added mass to my greenhouse. Not for weight, but for heat.

I bought three metal barrels used for industrial storage and transport of marmalade. There were actually still rests of it inside and it was not entirely easy to clean out (it smelled nice but I didn’t dare to eat it and I tossed it on the compost heap). After I cleaned them, I painted them matte black on the outside and smeared a bit of linseed oil inside on the bottom to seal any potential corrosion nuclei in the seams and some scratches. After a few days of waiting for the linseed oil to dry, I filled them with water.

That adds 600 l of water to the greenhouse in a form that should be heated up by the sun during the day and cool off – thus heating the greenhouse – in the night. The barrels take some space but that is not a problem, actually. I put them instead of the shelf where I put my seedling trays in the spring and citrus trees in the summer. I will now put lids on these barrels and my old shelf across the tops and I will have the same growing space that I did before, while hopefully extending my growing season for a few weeks thus getting slightly more tomatoes, peppers, and figs. We shall see how well this works. The barrels were not extremely expensive (about 140 € including the spray paint), but still more than a year’s worth of tomatoes – I would have to grow a surplus of either 30 kg of bell peppers or 60 kg of tomatoes to make up for them. Nevertheless, I hope they will reduce my stress in the spring and fall by not having to worry so much about sudden changes in temperature killing my seedlings or plants or my citrus trees.

Last year, I had approx 25 kg of tomatoes and I will use that as a baseline for my calculation of the “amortization” time for these barrels. As in, if I get 10 kg of tomatoes more, I will estimate the amortization to be 6 years.

If they hold the heat well enough to keep the greenhouse frost-free during a mild winter, I will leave my citrus trees inside over winter too. That would be a huge saving in work.