Yes everything that Obelixx said,I wouldn't put a citrus this small in a polytunnel. I don't know what temperatures you get or Obelixx. In the Beast from the East,we had -12 at night completely unheard of here. The lemons and grapefruit were in a small lean to green house, with a tubular heater,and bubble wrap. They all lost their leaves. The mandarin and calamondins are much more tender and live in the conservatory between November and march, when they will start going outside in the days.
Ok I live where it can drop too -35 mines will never be in a polytunnel outside in winter. They are in a greenhouse in my house but my house is so dry that’s why I put them in a green house with a humidifier to keep them moist ... sorry for my English
Anneg, your English is excellent. Where are you that it gets that cold?
Thank you I live in Montréal Canada 4 days ago we just had -20 in the night. January and February is the worse month for cold that’s why I’m scared for my citrus I know we don’t grow citrus in Canada but it’s so fun I’m also growing trees like redbud ,amelanchier , catalpa , black spruce and other stuff. Where you from ?
This forum is mostly UK residents or Brits abroad in Europe and a few native Europeans and Ozzies. Here on the Atlantic coast of France, -10C is considered extreme but plants in my polytunnel generally do OK.
I used to live in Belgium, out in the countryside and -20C was normal for 2 or 3 weeks every winter and my greenhouse was not sufficiently frost proof to grow citrus plants. Whilst yours are small, I would suggest bringing them into the main living area and keep them stood on a tray of damp pebbles in full light. The pebbles will provide humidity and you could also mist them every day with a simple water spray.
Vendée - 20kms from Atlantic coast.
"The price good men (and women) pay for indifference to public affairs is to be ruled by evil men (and women)."
Hi everyone I have lemon tree but it seems that one of the leaves is drying and curling they are in a little green house with humidity. Can someone help me. Thank you
The soil in this picture looks bone dry to me. I would say it needs a good long soak overnight in a dish of water before being drained and returned to the humidifier. Citrus are evergreen so need their soil kept damp, not waterlogged. The first sign of them being unhappy is the leaves drying and dropping off.
Hello Annegaelle. That is the wrong balance of fertiliser for your lemon tree. Assuming the 12-2-12 is the ratio of N,P and K, needed for Palms, you would be better off with a 12-6-5 ratio for your citrus.
Cacoethes: An irresistible urge to do something inadvisable
In my opinion, the problem is with the roots. Pot too big. You need to pull out, check the roots, plant in a small pot, water a little
I changed the pot in fall because the root were too big so I don’t think it’s that. The other citrus is doing just fine. But thanks I’ll look if there’s root rot.
As far as I know, citruses, like roses, love tall and narrow pots. This pot contains less soil than a standard pot. In any case, I grow up in such
Citrus plants like an acid, loam based compost. You need a specialist citrus fertiliser - engrais agrumes - and should follow the instructions for quantities on the pack. I give mine 3 dollops of this at Halloween, NY and Valentine's Day cos they're easy to remember. At Easter I work a handful of pelleted chicken manure (high nitrogen) into the compost.
You do need to keep the compost - terreau - moist but not dripping all year and if you see signs of the leaves yellowing, apply a foliar feed of Epsom salts dissolved in water and sprayed over the foliage. You need a ratio of 15ml of salts to 5 litres of water. It provides magnesium which is essential for plant health.
Vendée - 20kms from Atlantic coast.
"The price good men (and women) pay for indifference to public affairs is to be ruled by evil men (and women)."
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I used to live in Belgium, out in the countryside and -20C was normal for 2 or 3 weeks every winter and my greenhouse was not sufficiently frost proof to grow citrus plants. Whilst yours are small, I would suggest bringing them into the main living area and keep them stood on a tray of damp pebbles in full light. The pebbles will provide humidity and you could also mist them every day with a simple water spray.
Citrus are evergreen so need their soil kept damp, not waterlogged. The first sign of them being unhappy is the leaves drying and dropping off.
You do need to keep the compost - terreau - moist but not dripping all year and if you see signs of the leaves yellowing, apply a foliar feed of Epsom salts dissolved in water and sprayed over the foliage. You need a ratio of 15ml of salts to 5 litres of water. It provides magnesium which is essential for plant health.