Lettuce Culture

**most of my plant culture information comes from Wikipedia entries, opinions are all my own though.

Lactuca sativa, or lettuce, is a member of the Asteraceae family and actually makes a pretty little white or yellow flower similar to a dandelion if you allow it to bolt and go to seed.  When cut its stems ooze a milky white substance, hence the reason for the name Lactuca.  Some members of the Lepidoptera butterfly family eat lettuce.  In Ancient Egypt lettuce was considered an aphrodisiac.

Lettuce grows best in a humus rich, light soil, with constant moisture.  Lettuce prefers temperatures between 75 degrees and 45 degrees F.  A hot or dry environment may cause it to turn bitter and bolt, though this is less of a problem with certain bolt-resistant or heat-tolerant varieties.  Seeds can be direct sown into the garden or transplanted.  With a protective cover to keep lettuce from freezing it can be grown in mild climates nearly year round.

The primary types of lettuce are butterhead, romaine, crisphead or iceberg, and loose leaf.  Butterhead leaves have a buttery texture, they are similar to romaine, with less crispness and a shorter growth habit.  Romaine, or Cos, grows long leaves with a firm central rib, it is more heat tolerant than other varieties.  Crisphead, or iceberg, grows in a tight head similar to cabbage.  They have a crunchy texture and are generally the mildest flavored lettuces.  Loose leaf lettuce has tender, delicate leaves and doesn't grow a "head" but rather as a bunch of loose leaves.  Summer crisp or Batavian lettuce has a mix of traits of iceberg and loose leaf, being crunchy in texture and having only a moderately dense head.

The less bitterness a variety of lettuce has, the higher the water content, and consequently the lower the nutritional value.  All lettuce varieties will cross-pollinate easily, so be certain to allow only the cultivars you wish to harvest seed from to go to flower.

Lettuce is a fast grower, taking as little as 3 weeks to reach a harvestable size.  Remember to keep your lettuce plants moist, and protected from heat.  Slugs are the primary pest to watch for on lettuce, though cutworms can also ruin a planting by cutting the stems when seedlings first sprout.  Defeat slugs by baiting, hand picking, or laying down a copper barrier.  Protect from cutworms with a paper collar, or start lettuce indoors and move outside once they have a few true leaves on and have grown beyond cutworm edibility.  Lettuce can be grown indoors over the winter under a grow light or in a windowsill.

Mix varieties of red, green, and mixed color lettuce in a salad for a more interesting presentation.  Since lettuce varieties will cross so easily, try leaving two or three favorite varieties to cross-pollinate and see what exciting new crosses you can come up with.  For butterhead, romaine, or loose leaf lettuces harvest only the leaves you need and allow the plant to continue growth; crisphead is best harvested as a whole head. 

For planting: try planting lettuces under a fruit tree, in early spring they will receive full sun, and once the tree flowers and begins to put on leaves it will shade the lettuces leaves from the heat of the sun.  SFG suggests 4 lettuce plants per square, and they can also be interplanted between taller growing brassicas to protect and shade them.  If your tomatoes are ripening and you wish to have lettuces to go with them, try planting lettuce under the shade of the tomato plants, or in a shadier corner of the garden.  If all else fails, grow them inside during the hottest part of the year, in the cool of the AC.

You are unlikely to be able to preserve lettuce at all; it manages fine in the fridge for a few days though.  Be sure to stagger plantings every few weeks to ensure a crop all year and don't plant too many at once or you'll be swimming in fresh lettuce that HAS to be eaten, and can't be saved by preserving.

Happy lettuce growing!

Eggs Florentine and Other Spinach Culture

Let's talk green.  Spinach, that is.  Spinach is an early spring crop,  it prefers cooler weather and will bolt when it gets too hot, you can also plant it in the Fall but if you aren't careful about timing it may still bolt.  The earliest record of the spinach plant is from China AD 647.  Since then it has been used throughout China, India, the Middle East, and was introduced to the Italians in the 9th century.  Native of Florence, Italy, Catherine de Medici was a huge fan of spinach and insisted it be served with every meal; this is why "Florentine" is the label attributed to foods with spinach added.  (BTW, all my spinach trivia is via Wikipedia's "spinach" entry)

Spinach plant, this is a much healthier plant than mine were.

Like many leafy greens spinach is said to have high antioxidant levels, it is a great source of Vitamins A, C, E, K, and the B complex vitamins.  It is also high in many minerals, and is considered to be a rich source of iron. Storage of spinach for more than a few days can destroy its nutritional value though, which is one reason to grow it yourself; fresh from the ground it is packed with vitamins and minerals.  Spinach is also one of the 12 most pesticide-laden produce products, so even if you don't grow your own organically you should always be sure to buy it organic.

Spinach comes in three primary types: Savoy, with dark green crinkly or curly leaves; Flat or Smooth, with broad smooth leaves that are easier to clean; and Semi-savoy, with less crinkled leaves this variety is a bit easier to clean than a standard savoy. 

New Zealand Spinach is actually not even closely related to spinach, it was given the name because of it's resemblance to spinach.  New Zealand Spinach leaves are eaten and have a similar taste and texture to spinach.  Unlike normal spinach it is comfortable growing in hotter climates, and is nearly untouched by slugs and snails.  If, like me, you find you lose more spinach to the slugs or bolting than you get on your plate, then New Zealand Spinach might be worth a try in your garden.

Start your spinach seeds in the ground several weeks before the last frost date, 3 to 5 weeks is acceptable.  In my garden it's pointless to start spinach this early since my garden beds don't see sunlight until April, I start spinach at the end of March.  It takes about 7 weeks to reach full size, but can be harvested a few leaves at a time after the first 4 weeks or so, when the leaves are large enough to be worth the trouble to harvest.  According to SFG standards spinach can be planted as close as 9 plants per square foot. 

At my house, early Spring is slug season so I rarely see much spinach at all.  In fact, I likely won't even be planting it this year since I lose so much to the slugs and most of the rest to bolting.  For those who want to plant it be sure to protect it from slugs, and if needed shade it from the heat to prevent bolting.  Some tips for doing this can be found in my posts "Slugs and Snails and Puppy Dog Tails" and "Bolting Is Bogus".


Since spinach is so very happy to bolt like crazy, make sure to plant open pollinated varieties and let them go to seed when they bolt.  You can essentially have free spinach seed for life!  Last year my spinach bolted the first week of June, set flowers that attracted pollinators to the garden, went to seed, and dropped the seed by early August.  Then that dropped seed sprouted just as the weather began to cool, and a second crop popped up for fall.  Not a bad system when you think about it.

As a final note, while spinach can be a bit touchy, and is appealing to certain slimy pests; it also grows quickly, is packed with nutrition, and is very versatile in cooking.  Give it a shot, and enjoy.

"I'm strong to the finish, cuz I eats my spinach!"--Popeye the Sailor Man

Pea Culture

Hopefully I can get a few posts about the culture of different veggies up before spring comes along, to help out gardeners trying new things; on that note, this post is all about peas.

Pea plant in full fruit.

Peas originated in the Mediterranean and Middle East regions, they are eaten fresh or cooked.  They can be frozen, canned (pressure can method), or dried.  Peas are harvestable between 50 and 75 days depending on variety.  There are three primary types of pea; the snow pea, snap pea, and shelling pea.  Shelling peas are removed from the pod and only the pea seeds are eaten as the pods are tough and tasteless.  Snow peas are the variety most often seen in stir fries, whole pods with smaller undeveloped seeds inside.  Snap peas are eaten in the pod as well, but are even sweeter than snow peas and have a crisp, thick pod that is nearly stringless.  Depending on which way you prefer to eat your peas you could plant one, two or all three types of pea in your garden.

Peas are one of the first things planted in the spring, they can germinate in soils that are only 40 degrees F.  So long as the risk of hard frost has passed they can go directly into the garden.  Peas should be sown in the ground, rather than started indoors.  They are long and slim vining plants and don't always cope well with transplanting, they are also such fast growers, and have such large seeds that it's just much simpler to put them in the garden.  If they fail to germinate in a week or so, plant another round and keep waiting.  Pea seeds should be planted fairly deep, about an inch underground.  They take up little room and require little nutrition, they can be planted as close as 1-2 inches apart.  Or in SFG style, 8 plants to a square.  Pea seeds will only be viable for about 2 years, so despite their inexpensive price don't be tempted to stock up too much.  Peas are very easy to save seed from, simply leave the end-of-season crop on the vine until they brown and become dry, then harvest, dry further inside, then shell and store seeds in paper bags. (Avoid plastic bags as they can trap any remaining moisture and rot your seeds).  Peas also self-pollinate, they don't require pollinators, and generally each flower will pollinate itself.  This means that to accidentally cross two pea plants you pretty much have to rub them together.  Pea seed will fairly reliably produce seed that grows the same plants as the previous generation.

A cool season crop, peas prefer temperatures below 70 degrees.  Peas that mature in temperatures over 85 degrees can develop tough pods.  Also, peas stop putting on flowers once temperatures get over about 85 degrees.  Harvest continually to ensure continued production of fruits.  You can increase your harvest by using a pea innoculant, but innoculant in no way guarantees a great harvest. 

The greatest risk to peas is the enation virus, and you should watch for enation resistant varieties when selecting peas for your garden.  Peas actually build nitrogen stores in the soil they are planted in, so are a great winter crop or rotation crop to keep in the organic garden.  Move them around each year, or start an early spring crop in the space of later heavy feeders.  By the time the peas are finishing their growth the heavy feeding summer plants should be ready to put outside.

As vining crops peas will need a trellis of some type, which also helps to keep the fruits up off the ground and in easy picking reach.  Peas are an inexpensive, simple to germinate, delicious crop to grow and are perfect for gardens that have small children around.  Kids can pick them easily, eat them straight from the vine, watch how they grow and twine around each other and the trellis.  In general peas are a great crop for anyone.

Snow peas, purple beans, and zucchini: one day's harvest.

I prefer to grow the snow or snap peas, shelling peas are so easy and inexpensive at the store it just doesn't make sense to use up garden space on them, snow and snap peas are expensive though.  Plus, I don't look forward to all that shelling.  Snow peas are delicious eaten fresh, they can also be blanched and frozen for eating throughout the year.  Snap peas are also delicious fresh; sweet, crunchy, and very low in calories; snap peas do not store nearly as well though and can become mushy if frozen or canned.  I suggest growing primarily shelling or snow peas, with a small bunch of snap peas just to eat fresh.  Last year I planted 6 squares of peas, each square holding 8 plants and I was overwhelmed with the quantity of produce I harvested from them.  It may not seem like it at first, but over time, as round after round of peas is ready to pick you will find that each plant is actually very productive.  How many peas (in the pod) will you eat each day?  However many you think that is, that's probably about how many plants you need.  I will happily eat my way through 20-40 pea pods in a day, and my husband and kids rarely eat them.  So I need 20-40 plants to produce that amount, if I plan to freeze them I will have to plant more.  This year I am putting in more than last year because I only ended up with 2 quarts of frozen peas and would like to have more than that for next winter. 

Next time: Pea Recipes, My Own and links to others.

Plant Genetics and Hybrids

Punnett square showing pea cross

Ever seen one of these before?  It's called a Punnett square.  Do you remember high school biology? If so, you probably remember learning about Mendel and his peas.  Gregor Mendel used these little squares to determine certain laws about how genetics work, he used peas as one of the experiments to test these theories. 
in the Punnett square above you can see two pea parent plants.  One is yellow and has a dominant Y (yellow) gene and a recessive y (green) gene, the other is green and has 2 recessive y (green) genes.  When these two plants cross-pollinate the seed they produce will grow into 50% yellow peas and 50% green peas.  But what if you only like yellow peas? Well then, you'd better not grow any green ones nearby or cross-pollination could happen and you'd end up with some green in the mix.

So why talk about genetics on a garden blog? Because of hybrids (and I don't mean cars).  Hybrid seed is often listed as F1 or F1 hybrid.  Basically this is a first generation cross of two plants that show good qualities.  While hybrid seed has it's advantages; being consistent in phenotype, having the best qualities of both parents, and being widely available.  It also has disadvantages for the home gardener.  Primarily, the seed from two hybrid parents will likely produce a large amount of recessive seeds.  This means that two parents with great qualities will likely produce 75% recessive gene (bad quality) seeds.  Those seeds will then grow into plants that don't have the same color, flavor, heat tolerance, or disease resistance that the original hybrids did.  Or they will simply be sterile and not produce usable seed at all.

The alternative to hybrid seed is open pollinated seed.  This means that the plants that will grow are from a stable genetic background that has been bred over many generations to eliminate most recessive throwbacks.  Open pollinated plants will also cross together to create new strains with very similar qualities of the original plants.  The major advantages to OP seed is being able to save your own seed (saving you money), creating new strains, and each successive generation grown in the same area will show improved adaptation to that area.  If your garden seems to suffer from something unknown fairly regularly, after several generations an open pollinated plant will begin to build a resistance and you will see each new generation producing healthier and better producing plants.

There are some exceptions when buying OP seeds that need to be understood.  OP plants will cross-pollinate with ANY nearby plants that are genetically close enough to them.  For example, carrots are only sold as F1 hybrids in my area because a common weed here is too close a relative to them to make the resulting OP seed safe for eating.  Queen Anne's Lace is everywhere in this area, and is a close cousin to the carrot, but not edible.  If I were to collect any seed from carrots I grew, it would most likely produce Queen Anne's Lace, and some half-QAL half-carrot hybrids.  So in this instance I am forced to buy hybrid seed. 

Seed catalogs often list plants as hybrid or OP and a little research can help you to decide which is best for you.  There are many books on plant biology and genetics as well to help gardener's learn how best to breed plants.  One thing to be careful of when collecting seed from plants is the crossing of different species within the garden.  Pumpkins, butternut squashes, acorn squash... all of these are from the same plant family and it is possible to have them cross pollinate unintentionally.  If you are serious about your seed production you can limit this by either only planting one type of each family in your garden, planting the different species far from each other, or by selecting a newly opened flower, hand pollinating it with the correct pollen and then gently bagging it to keep other pollens out until it begins to fruit.