As we watch the seasons change, we too try to change to adapt our growing approach. The tomatoes have been amazing this year, but as the first plants established, those in the small tunnel have started to burn out. and it is time for them to be removed. So a couple of weeks ago we made a start.
Looking rather sorry for themselves, we soon removed what was left of the plants, no need to try to save any fruit, they too were all burnt out. Planting in homemade compost bags, were both easy to install and just as easy to remove and recycle, all the compost being incorporated into our outside grow beds.
A little like the omelette saying and the breaking of eggs, the space starts to look worse before it looks better, but removing all the plants starts to display how big a growing space this small tunnel provides.
All plants and plastic removed and a sweeping brush does wonders, the lights already in place and ready to be switched on, all that was needed now was the installation of the staging to hold the grow trays.
Already constructed and stored in the barn over the summer, the main installation task was the levelling to ensure effective watering and feeding - Melv set to work. As the sun, although weak sent its rays, both the temperature and light levels increased rapidly and dramatically, it felt exciting that the salads in desperate need of both were soon to benefit.
As soon as installation of the first staging was complete I took no invitation to transport the existing growing trays in.
From all the research and experimental work undertaken last year and the need was currently to bring the colours out of the leaves. To change them from being washed out and pale, due to poor and reduced light levels that the end of the summer brings, to provide the conditions to encourage colour and vibrancy. Their growth pattern also needed to be improved, so that they present a better structure, with stronger and more robust leaves that don't have the appearance of stretching for light.
We knew the lights were more than capable of doing this and that operating them during the day to supplement the daylight would do the trick. It was reassuringly good to feel that we knew the lights that we had worked so hard with the company, GN UK Ltd, who created them to get right, would be able to provide the additional levels needed, but also the colour combinations of red, blue and white spectrums required and would have the desired effect.
Importantly, operating them in this way meant that we could utilise the energy being generated by our solar array and so keeping the cost down and make the process as efficient as possible. This side of our salad growing operation plays a significant part. Although the market for the salads is at all times consistent and they are in very high demand, providing an essential and important link to our customers right through the year. From the local people to the busy Sheppey Inn, with the latter typically using more salad over the Christmas period than during the summer months. And although they essentially provide a valuable income particularly during our leaner times, despite this, the price they demand does make them fall within the category of being a low value product and the ambition has to be to keep their production cost to a minimum.
Operating from 10am until 4pm, we have been managing to achieve a DLI (Daily Light Integral) of between 14 to 19 and on many days at the high end of this spectrum, compared to outside conditions that have typically been a DLI of between 5 to 9. The salad leaves really require a minimum DLI of 14 or 15. So in theory we were hitting the mark - but theory is one thing, what about in practice were these levels being demonstrated in the growth rate, structure and appearance of the salad trays?
Of course!!!
Once again the colours have become intense, with the red leaves rich and vibrant, with an intense depth of colour. With regards to the structure and overall appearance - after just 5 days it is hard to comprehend the difference and only to be believed when two trays are presented side by side for comparison. Sown in the exactly the same way using the same materials, the lower without the lights the upper with 5 days of lights operated 6 hours a day.
Close up the difference is even more dramatic and one that we can't help but be proud of and pleased with.
It is lovely to be able to say that whatever the weather outside winter salads are now a pleasure to grow, sell and eat!!