When cold weather exercise set in , most farmers close up their marketplace cubicle for the time of year and compact it in . However , a Fannie Farmer looking to go on earning income in the off - season can turn to a greenhouse as a time of year extender , offering bring out to athirst customers year - round . But what crops are best for greenhouse production ? And what is the winter client looking for ? These are things you ’ll need to place before set off your glasshouse functioning . While it will take a niggling morsel of grocery research on your part , here are our favorite greenhouse crop , as well as how to maximizing your yields and get them into the hands of eager customers — though if we ’re being fair , bring a impertinent carrot to food market in February and it will market itself .
1. Cut and Head Lettuce
Lettuce is a relatively audacious vegetable , and a popular one no matter what sentence of year . Grow a few dissimilar lettuce mixture for mixes , as well as some colorful wampum heads , to draw customer in .
Grow It:
Sow seed for leaf mixes thick , preferably using a seeder , in tight rows 2 to 3 column inch apart in 4 - foot - broad bed . Cut leaves off one industrial plant up to four times , tasting every prison term to make indisputable it has n’t become too sulphurous . For head gelt , sow or transplant seed 10 to18 inches aside , depending on the variety . chronological sequence - plant in former declension and late wintertime .
Market It:
merge slice lettuce in pliant bags or close in tote , and exhibit out of wind and sun . stuff shot head lettuce in sportsmanlike , cold body of water before marketplace , and expose on table . Keep both cut and head lettuce well - misted and spectacular on the table . Few foods soak up people in like impudent lettuce , especially the darker , red-faced miscellany .
2. Spinach
Spinach is a classic greenhouse crop . It must appease watered and the farmer must quash extreme temperature shift by monitoring the nursery , but spinach plant can be trend from several time in a time of year and provide a dependable off - season income .
For full leaf Spinacia oleracea , sow seeds 1 to 2 column inch apart , in run-in 10 to 18 inches apart . For baby prickly-seeded spinach , you’re able to sow in seeds in wider dance band , in rows 6 to 10 inches apart . Succession - plant in early fall and late wintertime .
If grow full Spinacia oleracea leaves , harvest from the stem , wash and marry in large , attractive bunches . Bring a baby Spinacia oleracea harvest in a tote or in single traveling bag , or consider look at making salad mixes with your prickly-seeded spinach and lettuce .

3. Other Leafy Greens
Leafy greens like kale , collard greens and Swiss chard are not only wildly democratic but are a large fit for farmers wanting to extend the growing season . The flavor of some green , like gelt , even improves with a small insensate . These crop are also ideal because unlike broccoli or sugar , where you get one cutting off and that ’s it , these greens can be pick off of all wintertime and provide months of income .
Whether you inseminate semen or use transplants , result at least 8 to 10 column inch between flora and about 24 inches between rows . Plant into fertile soil in early fall and recent winter , and water on a regular basis for near leaf product .
splice or bulge your greens in large , attractive bunches . Keep farewell mist and out of the wind to avoid droop . Come to market place with a full load — you’re sure to betray out !

4. Microgreens
Microgreens are petite , tender versions of familiar vegetables like mustard , cress , radish , beet , sweet basil and kohlrabi that load down a huge nutritional clout . you may grow microgreens from crepuscle to spring , but because they are slightly esoteric , also deal regain a buyer before they you plant . The good news is that eatery be given to have a go at it these tiny fusillade of green , specially when there are n’t a whole lot of other greens available . Also , the two- to four - week harvest turnover and high Mary Leontyne Price tag they garner make them a pretty attractive option .
Fill small flats with filth , and follow the sprouting necessity for your chosen microgreen . Sow seed thickly , cover with a belittled layer of soil mix , and keep moist , sooner from underneath the tray , as to nullify splashing turd on greens . Plant from declension to give .
Even though it ’s impertinent to find a buyer ( such as a eatery or foodstuff stock ) before planting , microgreens will betray well in a meddling market . Harvest when the first true leaves develop and when the sprout are about 2 inches magniloquent , after about two to four weeks . lap the microgreens and institute to grocery in either a carryall or in individual charge card old bag , tie off with quite a little of line .
5. Carrots
Carrots are n’t always think the best enjoyment of nursery space because they grow so well in the clear with a small row concealment . But also weigh this : Most winter are wet , and if the carrots are quick but the garden is mud , it ’s a lot easier to dig out them out of a space where you control the moisture .
Sow sow thick in rows 16 to 24 in asunder . As plants grow , thin to 1 inch apart , and keep well - watered . works in late summertime and recent winter .
Harvest , dampen and tie carrots in large , attractive bunches , with partial leafy vegetable on . you’re able to impart the intact greens on , and some customers love that , but others will find the greens cumbersome . The green may also take up a large helping of your market display than you would like and hide the other gang .
6. “Summer” Crops
Tomatoes , Madagascar pepper , aubergine and cucumbers might not be the crop you desire to deal at the wintertime market , but you’re able to at least extend their season by turn them in a greenhouse . you’re able to also grow starts of each of these plant to sell at market in the bounce .
You will not need much help sell these items in the off - season . If you do want to improve their visibleness , however , the fall is a great time for pickling and canning , so consider marketing these crop as “ put up veggies . ” Of course , being the first or last to arrive at grocery store with tomatoes and peppers will make you a popular seller no matter what .
7. Herbs
Whether it ’s Basil of Caesarea , cilantro , tarragon , rosemary or thyme , if you have good restraint over the temperature of your greenhouse , herbaceous plant startsare another highly marketable product . Keep in mind that germinating and raising herbs requires a little more attention to detail but can be profitable under the right condition .
Selling herb starts can be a dandy business , especially in condition of perennial herbs , like oregano and rosemary , but even one-year herb do well . Bring them to market in attractive trays and consider growing them in or moving them into biodegradable container that can easily be embed into the ground . Also , provide some simple growing peak for each crop––customers will by all odds apprize the extra effort .