Posted by Stephanie | Posted in Vegetables | Posted on 29-09-2006
Ooops, Nadia! Apparently when we sent out the email link to introduce our blog with our spinach topic, we failed to include our blog on lettuce where we showed a cold frame and offered a little more info on how to grow cool-season greens. So, I’ll post more here on the steps to take in growing your own spinach and in using a cold frame to extend your spinach (and other greens!) harvest into the winter months. My thanks to all the folks who emailed their questions and comments to me at anita.dover@gmail.com. I hope this new info is helpful to everyone.
When?
The absolute best time to grow spinach depends upon where you live. For those in Northern climates, early spring is the best time to sow spinach, but folks in warmer areas can grow it in early spring or in fall for a winter harvest. Spinach is a cool-weather crop, but if your crop lingers on after the weather grows hot, you can try shading it with shade cloth to get just a little more out of the harvest before summer kicks in.
If you’re unsure of how to tell what time is best for your Zone/area, consult your local county extension agency for the best dates to sow crops according to where you live. Each state has a Land Grant Agricultural University that provides detailed information on plants, gardening, landscaping, insect control, etc. These Universities also publish booklets and provide online information for all types of gardening and plants. A list of local extensions can be found (click here) at the following web address: www.csrees.usda.gov/Extension/index.
Where?
Spinach does best when grown in full sun, but will tolerate partial shade. Plant in well-drained, fertile soil with lots of organic matter mixed in, with as close to neutral pH as possible. If you’re starting in spring, prepare your soil this fall because late winter weather can make a mucky mess out of digging. Mix in a few inches of compost or well-aged manure to a depth of 8 to 10 inches and remove any rocks or large clumps in the process.
How?
Sow seed ½ inch deep in rows 12 to 18 inches apart. Space seeds about 1 inch apart to begin with, but once seedlings reach an inch tall, thin them to 4 to 5 inches apart – remember, you can save the thinned seedlings for salads, too! Keep moist until germination occurs. Germination usually takes 8 to 10 days, but when sowing a late summer or fall crop, germination can be hastened by placing seeds in the refrigerator for 1 week prior to sowing.
In spring, sow successive plantings about a week apart until 6 weeks before daytime temperatures are above 75 degrees F to ensure a constant supply of spinach. Start sowing again in late summer for a fall and winter crop – spinach may stop growing once freezing weather arrives, but it will overwinter in warmer areas and start growing again in early spring.
Maintenance?
Spinach has shallow roots and requires ample, consistent moisture to perform its best. If you’ve prepared your soil with good compost or aged manure, it shouldn’t require much fertilization throughout the season, but you can apply an all-purpose fertilizer (according to package directions) if the normally dark green leaves start to yellow. An inch-thick top-dressing of compost or mulch helps to keep roots cool and moist and discourages weeds.
Harvesting?
Once the plant has at least four to six true leaves, you can start picking young outer leaves as needed for fresh use, but cut entire plant off at soil level when leaves are 6 to 8 inches long and before the flower stalk forms. Each variety has a different maturation rate, anywhere from 30 to 50 days.
Other pointers:
- Different spinach varieties can be more cold-tolerant, heat-tolerant, fast maturing, etc. Choose the right variety based upon where you live and the growing conditions of your garden.
- Spinach leaves can either be smooth or crinkled (savoyed).
- Pick young leaves for fresh salads and use older, larger leaves for cooking – stir-fries, sautéing, casseroles, soups, stews, etc.
For those in warmer climates that don’t ever really get a “cool” season – Hello Southern Florida! – or those that want to grow spinach throughout summer, try ornamental but edible Malabar Spinach. It’s not technically “spinach,” but its leafy greens are just as good, if not milder, than traditional spinach. Another alternative is to grow it in a windowsill pot indoors, which is also an ideal way to grow lettuce!
More on Park Seed’s SeedHouse Portable Coldframe
If you’d like to try growing spinach this fall and into the winter, a cold frame will help keep temperatures above freezing, shelter tender plants from wind and rain, and extend the active growing period. Basically, a cold frame is a structure with four sides and a hinged, transparent top, usually made out of glass or plastic, that you can open and close depending upon the outside temperatures. They’re used during cold weather as a mini-greenhouse of sorts to either start plants earlier or extend a cold-hardy harvest into the winter months. Park Seed offers one that’s extremely practical because it’s portable. Most times gardeners throw together whatever old glass window or scrap lumber they can find to make a cold frame – kudos to us for being so recycling-minded! But for those of us who are all thumbs or are short on time and space, it’s great to have one that’s lightweight and can be folded up for easy storage when not in use. For a clear and concise definition of a cold frame (sorry – I tend to ramble), click here or go to http://en.wikipedia.org/wiki/Cold_frame.
Swimming in Spinach – yippee!
Anita










