Thursday 26 December 2019

My new greenhouse

For quite a while now I have dreamed to own a greenhouse but never got one as I could use a small corner of the large greeenhouse at my workplace which has lighting and heating. But change of management meant that I had to vacate my little space there and look for other options to grow plants undercover. I had a look around on the internet and came across a small sturdy greenhouse (Halls Popular 6x6) which was recommended for allotment sites. The greenhouse also came with polycarbonate glazing and a steel base with ground anchors. As we are not allowed any glass on the allotment site this was perfect so I took the plunge and ordered one.

I already had the place where the greenhouse was supposed to go in my mind and just had to measure it to make sure there was really enough space there. Next I had to shift quite a lot of soil to level the area and get it ready for the greenhouse assembly.

I shifted lots of soil to make space for the new greenhouse
The crazy paving path for inside the greenhouse is finished
Three weeks later the big day had come and the greenhouse arrived on the allotment site in two boxes. I found it quite amazing that there was actually a complete greenhouse in these two not overly large boxes! The prospect of assembling the greenhouse from scratch was quite daunting but luckily I had my two friends Sarah and Lucy helping me which made it much easier.
The parts were all packed together in the order they had to be put together, base, back, front, the two side parts, roof, window and door with the polycarbonate sheets in the second cardboard box. All parts had numbers which corresponded to the numbers and pictures in the instruction booklet.

We started with the base which was very easy but one of the bolts was dodgy so it was lucky I found another one in my little screw and bolt collection. The base had anchors which we buried in the ground and made sure everything was level.

The greenhouse base is in place
 Next we put the back and front together which was straight forward as the instructions were quite clear. We only had to make sure the parts were put together in the right way. The side parts were next and were as straight forward as the front and back. Once all of these parts were finished we bolted them all together and attached the roof. The roof window went in and in the next step the whole greenhouse frame was securely attached to the base.

Front and back of the greenhouse are put together
The greenhouse frame is finished and bolted to the base
The roof window is in as well
Building the door was relatively easy but attaching it to the greenhouse frame proofed quite tricky as the instructions were a bit difficult to understand. After several failed attempts I realised we had to turn one of the door parts around which eventually did the trick and finally the door was finished as well.

The door was quite tricky to attach to the frame
Now the next steps involved getting the greenhouse frame ready for the polycarbonate glazing. Thin rubber strips needed to be attached to the frame and alluminium end strips to the polycarbonate sheets. Attaching the rubber strips was time-consuming but straight forward. Attaching the alluminium strips to the top and bottom of the polycarbonate sheets proved much more difficult as they were very stiff and it was nearly impossible to push them onto the sheets. After much swearing I finally had the idea to squeeze the top and bottom of the polycarbonate sheets slightly together with the help of some pliers and finally the alluminium strips could be attached to the sheets.

After all the time-consuming preparations the actual glazing was easy and relatively quick. The sheets had to be attached the right way around as only one side was treated with UV protection so we had to be careful. The sheets themselves were attached to the greenhouse frame with W-shaped metal clips. We used nearly double the amount of clips than recommended just to be on the safe side. The sheets seem quite secure and nothing is moving. We had a few stronger winds now and still everything is in place.
All in all it took us about two days to build the greenhouse.

All the polycarbonate sheets are in
I am happy :-)
Myself with my friend Lucy (inside the greenhouse)
I have started sowing a few things already now, some radishes, lettuce and kohlrabi and a couple of perennials. At the end of January I will sow some more perennials and the bulk of vegetables and flowers from March onwards. A few tender vegetables such as tomatoes, beans, sweetcorn and courgettes I will start at home in my mini greenhouse in the back garden and only transfer them to the greenhouse on the allotment once it is safe to do so. I also want to try out a few grafted vegetable plants such as cucumber, melon and tomatoes so see what the difference is to conventional non-grafted plants. Apparently grafted vegetable plants are much stronger growing and produce a lot more yield.
I have also planted a blood peach tree 'Sanguine de Savoie' at the back of the greenhouse which I will fan-train so it does not take up too much space. This peach is apparently one of the tastiest peaches in the world which I hopefully can soon confirm.


Sowing has started
Exciting times are ahead and I am really looking forward to filling the new greenhouse with lots of different vegetables and flowers next year.

The new greenhouse sitting comfortably between the grasses and other perennials

Monday 9 December 2019

Spring bulbs for pollinators

Late winter and early spring are a difficult time for early pollinators as not much is flowering, especially if the weather is warm and bumblebee queens and other early pollinators have woken up too early. But it is easy to plant some early bulbs to provide food and nectar for hungry garden visitors.

First to flower are Winter aconites (Eranthis hyemalis), flowering in January. Strictly speaking, these plants do not grow from bulbs (a short stem with fleshy leaves which functions as a food storage organ during dormancy) but from tubers (enlarged structures used as storage organs for nutrients, often associated with roots). I have only seen pollinators visiting the flowers a few times on very mild winter days because they flower a bit too early. But in a warm spell in January they are certainly useful. Winter aconites grow best in moist humus-rich but well-drained soil under deciduous trees.

Winter aconites flower very early in the year

Flowering in January and February are snowdrops which have delicate-looking flowers but are tough as old boots. They can even be covered completely by snow or get frosted repeatedly and look no worse for wear. It is best to plant snowdrops "in the green" in February meaning as plants which have just finished flowering. The bulbs don`t survive long when they are out of the ground as they dry out too quickly, that is why it is not worth buying bulbs from garden centres in autumn.


Bumblebee queens like visiting snowdrops

Two red-tailed bumblebee queens
Crocuses start flowering in February and continue into March. They are great plants for bumblebee queens, hoverflies and early solitary bees. Planted in large clumps all over the garden provides pollinators with a useful food resource. I have planted small amounts of bulbs in different places on the allotment years ago which multiplied nicely and I have now many large clumps. I prefer the small species crocuses such as Crocus crysanthus and C. tommasinianus over the large dutch crocuses but all provide pollen and nectar. Crocus likes sunny well-drained areas of the garden and also grows well in grass.


A pretty little hoverfly (probably Scaeva pyrastri)
This bumblebee queen is nearly too heavy for the crocus flower
An early solitary bee (Andrena sp.)
A hungry buff-tailed bumblebee queen
A white-tailed bumblebee queen visiting a Crocus crysanthus flower


Andrena bicolor, a solitary bee
The first tulips start flowering in March, with the last ones flowering in May. There are lots and lots of large-flowered cultivars but I prefer the smaller wild tulips such as Tulipa sylvestris, T. turkestanica and T. saxatilis as they look after themselves and come back every year planted in my well-drained soil. I also think they are more attractive to bees and hoverflies. Tulips need sunshine and well-drained soil which should not be too rich as most wild tulips come from mountain areas in eastern Europe and Asia.


A garden bumblebee queen visiting a tulip flower
Another Andrena bicolor inside a tulip flower


Another great bulb for pollinators, flowering in March and April, are grape hyacinths (Muscari). I have seen all sorts of pollinators visiting the flowers, but especially solitary bees and butterflies. The common grape hyacinth Muscari armeniacum can spread quite a lot when happy but there are many other more well-behaved grape hyacinths such Muscari latifolium and some cultivars of Muscari armeniacum. Muscari like similar conditions to wild tulips but can grow well in normal garden soil as well.

This small tortoiseshell butterfly likes the Muscari flowers

You might wonder why I have not mentioned daffodils which fill road verges and gardens with colour in spring but in my opinion they are not as good for pollinators as the other bulbs mentioned. Wild daffodils (Narcissus pseudonarcissus) are probably the best to grow, but the more showy cultivated daffodils don`t offer much pollen and nectar.

Most bulbs can be planted in September and October, but tulips are best planted late October and November as they will be less susceptible to tulip fire then. Snowdrops and Winter aconites are best planted "in the green" just after flowering in late winter.

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