How did the solarium perform?
February 2nd, 2012 by Jim JustThe worst of the cold weather is probably behind us, as spring approaches. The sun is out, and thoughts once again turn to the garden. It’s timely to review: how did our solarium perform over the short days and freezing nights of winter?
Adding thermal mass proved not to be enough to protect tender plants if outside temperatures dropped below ~25°. For the coldest nights, we needed to come up with a supplementary heat source. We use brooder lamps for ducklings. Why wouldn’t the same concept work for plants?
Electricity was the primary problem: a source wasn’t readily available, and providing a permanent hookup didn’t seem worth the cost or effort since power was needed only a few nights out of the year. So I wired an outlet at the solarium ceiling for two heat lamps to hang above our most sensitive citrus, an Improved Meyer Lemon and an Owari Satsuma Mandarin from One Green World that we planted right in the ground.
Power is provided when needed by plugging as extension cord into a male receptacle in a weatherproof exterior “inlet”.
This system works so well that we’ve moved into the solarium all of the cold-sensitive plants that we previously overwintered in the greenhouse. Space is at a premium in this 7? x 7? structure, so we’ve had to be inventive. Around the Yuzu Ichandrin, we installed shelving for pots . . .
. . . and above, a piece of ¾” pipe serves to hang containers.
Staggering the height of the plants allows more to be squeezed in along the pipe.
In the ground within the solarium, we’ve been growing herbs all winter long, herbs that otherwise wouldn’t grow in winter: cilantro, parsley, and an herb form of celery.
Fresh “cutting” or “soup” celery is great to have in the garden as celery, along with carrots and onions, are the three essential aromatic vegetables used in making stocks and sauces. Buying a whole head of celery in the store is wasteful. Although a good market will let you buy one stalk at a time, we’re a long way from a market. So keeping fresh celery on hand would otherwise be a challenge. Now all we have to do when celery is called for is wander outside - with the solarium, any time of the year – pluck a few stalks, and tie them together with other herbs in a bouquet garni. Nichols has the seeds: VCE185, Afina. Plant seeds once, and from then on the celery will self-seed prolifically.
An added benefit: as long as I was wiring the solarium, I installed an outlet in the adjacent greenhouse to provide power for a heat mat. A heat mat will enable us to begin sprouting seeds in early February, a month earlier than would otherwise be possible. So it’s now time to begin perusing the seed catalogs and planning for spring plantings. Nichols and Territorial, here we come!




































