Monthly Archives: October 2015

Winter can be hard on everything, including the trees that need to go inside for the winter.
It is so important to have a good fertilizing program during the spring and summer months so the tree is hearty for the winter. A good fertilizing recipe is found on our blog here: http://lemoncitrustree.com/store/citrus-blog/2015/08/11/feeding-recipe-for-a-happy-tree/

Trees taken inside for the winter can continue to be fertilized, because there is no fear of frost damage.

Good lighting is a requirement for all citrus, and this can be daunting task when sunshine is rare in the winter months. Trees taken inside for the winter are considered to be in a partially sunny environment throughout the season.

Citrus need FULL SUN 6-8 hours a day. Anything less than 6-8 hours of full sun, is considered partial sunshine. So a tree placed near a window that gets full sunshine a few hours, in NOT full sunshine. Any real sunshine your tree might receive in the winter can be very limited, unless you have a sunroom and that will also depend on the location of your sunroom. So a good rule is, unless you have a sunroom any sunlight your tree may receive is minimal. Without a sunroom, additional lighting will be required throughout the winter months and possibly even with a sunroom you may find you need to supplement lighting.

My main concern is to help the winterized citrus get through the winter months, and I also tried to be conscientious of costs. I wish I could recommend a metal halide (MH) as it is the best choice for citrus, but I can’t recommend them, due to the costs involved. So my second choice ( to keep costs low) I recommend a compact fluorescent light (CFL) 5000k grow bulbs, which  is full spectrum bulb which promotes overall plant growth. This should be screwed into a reflector, so the light is directed onto the tree and not used just as a bulb in a standard lamp or overhead light. Without the reflector the light is too dissipated to be of much use.

The lights can be purchased as a full set, bulb with reflector at http://www.littlegreenhouse.com/accessory/lights.shtml

If you chose the above option, the reflector can take up to a 150 watt bulb, so you can increase the wattage from a 40 watt that comes with the reflector up to a 150 watt, if that is your preference.

You can also purchase the grow bulbs through Amazon with higher wattage bulbs than what is offered with the reflector at littlegreenhouse, just be sure you also purchase a reflector. Make sure whatever reflector you buy, you don’t go beyond the wattage recommended for that reflector. Please don’t inadvertently buy a reflector that takes up to a 150 watt bulb and screw in a 200 watt bulb.

The grow lights should be left on a minimum of  8-12 hours at least. If the tree gets good sunshine and the sunshine is shining directly on the tree a few hours EVERYDAY, then you may be able to turn the lights off after 6 hours.

I also recommend Dyna-Gro DYFOL008 Foliage Pro. Used during the winter months.
Dyna-Gro is suppose to help plants thrive in low light environments and that is exactly the concern in the winter. Dyna-Gro should be used an hour BEFORE lights are turned on in the morning, at least once a month (or not more than the package directions.)

When lighting is supplemented, turn lights out at night. Plants require day and night.

Misting trees with a spray bottle will help with humidity, adding water to the catch tray also helps, just don’t allow the bottom of the pot to sit in standing water. If you mist the tree to add humidity, only mist about an hour before the lights are turned on, as wet leaves might cause burning.

When watering trees in winter, keep in mind the water coming out of the tap is a lot colder in the winter. Water the tree with warm water ONLY.

It’s important not to place the tree near a heat vent, this will dry out the tree. Turn off the vent if possible or redirect the heat away from the tree.

If you have green leaves dropping off the tree after you have placed it inside for the winter, it is more likely a lighting issue. You will need to keep the grow lights turned on longer, or may need to up the wattage of the bulb.

Happy Winter Growing,

Nancy