Article: Celery plants are heavy feeders that require rich soil that must be fertilized frequently. To keep your celery plants happy, fertilize with a nitrogen-rich fertilizer every few weeks from planting to harvest. The most important aspect of caring for your celery plants is making sure that they are always well-hydrated. If they do not get enough water, celery plants will become shriveled and bitter to the taste. Blanching consists of shielding the celery stalks from the sun to achieve a milder flavor. Cover the stalks with newspaper, a milk carton with the top and bottom removed, or any other type of paper or cardboard. You can use twine to tie the celery stalks to keep them from sprawling. While blanching is not required, it will alter the taste and color of your celery. Additionally, blanched celery is less nutritious than unblanched celery. Most people prefer the sweeter taste of blanched celery. Be aware that some varieties are "self-blanching" and don't need to be blanched. You can begin to harvest the stalks when they reach 8 inches (20 cm) in height. Make sure to begin your harvest from the outside stalks and work inward. This allows the innermost stalks to continue to mature. Once mature, celery can sit in the ground for about 1 month as long as the soil remains a cool temperature between 60 and 75 Fahrenheit (16-24 Celsius). The longer the celery grows and the darker it becomes, the richer in antioxidants and more nutritious it will be. However, it will also become more tough and fibrous.
Question: What is a summary of what this article is about?
Fertilize every 2 to 4 weeks. Water your plants regularly. Blanch celery 1 week to 10 days before harvesting, if desired. Harvest the celery stalks, leaves, and/or roots.

Problem: Article: You must have vaginal sex to be pregnant. Oral sex doesn't count in this case. Also, consider whether you practiced safe sex. If you weren't on a birth control pill and didn't use another form of contraception (such as a diaphragm or condom), you have a much higher chance of getting pregnant than if you did practice safe sex. It actually takes about six to ten days after you have sex for the fertilized egg to start the implantation process, which is when you officially become pregnant. That's also when your body starts releasing hormones. A pregnancy test is most accurate if you wait until you miss a period to take it. A missed period is often one of the first signs that you may be pregnant. If you go past your expected start date by a week or more, that could be an indicator that you're pregnant. If you track your period, figuring out when you had your period last should be easy. If you don't, try to remember the last time you had your period. If it's been more than a month, it could mean you're pregnant. However, this indicator isn't foolproof, especially if you have irregular periods. While your breasts will increase in size over the course of your pregnancy, you may also notice changes early on. Hormones fluctuate in your body when you become pregnant, which can cause tenderness and swelling in your breasts. Once you adapt to the hormonal changes, this particular pain may decrease. Pregnancy can often bring on fatigue. You're growing a new life inside you, and that's hard work. However, in early pregnancy, this tiredness is more due to the fact that you have an increase in the hormone progesterone, which can cause drowsiness. "Morning sickness" is a common issue with newly pregnant women. This refers to nausea that tends to happen in the morning, but can occur at any time of the day. Often, this symptom starts about two weeks after conception and eases up after the first trimester. On average, about 70-80% of pregnant women experience morning sickness. You may also experience aversion to strong smells or certain foods, while at the same time, you may start craving other foods. You may have other digestive problems like constipation. Many women claim to develop a heightened sense of smell, and pick up on noxious smells like spoilage, smoke, and body odors more sensitively. This heightened sensitivity may or may not lead to nausea. One of the early symptoms you may notice is running to the bathroom to urinate more often. This symptom, like many of the symptoms you'll experience if pregnant, is due to a change in hormones. Later in the pregnancy, the baby can put pressure on your bladder, which causes you to run to the bathroom. However, early in pregnancy, frequent urination is more likely to be due to hormonal changes. Some women have a bit of spotting around when their period should begin. You may notice a bit of blood in your underwear or some brownish discharge. It may continue for a few weeks, but it will likely be lighter than your normal period. The hormonal changes of pregnancy can affect your moods, causing you to be euphoric one minute and crying the next minute. While not everyone gets mood swings early on, it can happen. If you find you're crying at the drop of a hat or snapping at your loved ones, that could be an indicator you're pregnant. Dizziness can happen at any time during pregnancy, including early pregnancy. In early pregnancy, the cause is likely the fact that your body is creating new blood vessels (causing a change in blood pressure). However, it could also be caused by low blood sugar.
Summary: Think about when you last had sex. Notice when you've missed your period. Watch for changes in your breasts. Check if you're feeling overly tired. Pay attention to stomach problems. Notice if you're running to the bathroom more to urinate. Look for implantation bleeding. Keep an eye out for mood swings. Watch out for dizziness.

You might be able to buy some duckweed from pet stores in your area. Otherwise, you can take it from a pond it's growing in. Fill your container with some water from the pond. Then scoop some duckweed from the pond with your hand and place the duckweed into your container. Place the lid on the container to prevent splashing while you bring the duckweed home. Between 50-100 duckweed pods will be enough as they will grow and multiply quickly. You'll need potassium permanganate to disinfect the duckweed. Mix one teaspoon of this chemical in 12 gallons (45L) of water. Place the duckweed into the permanganate solution for 30 seconds or so. Potassium permanganate can be bought at your local pharmacy. Disinfecting the duckweed will make sure that it is free of pests and bacteria. This will help you create a suitable environment for the duckweed to thrive in. Fill the tray with freshwater and add the duckweed to it. Use freshwater from a pond for best results but you can also use tap water. You need to use freshwater as duckweeds are freshwater plants. This is why they only grow in ponds and not at sea. Salt water will kill the duckweed. The best place to put the tray is right next to a window that receives at least 10 hours of sunlight each day. Like many plants, duckweed will thrive in direct sunlight. If you see duckweed in a pond, notice how the pond is almost completely without any shade and receiving plenty of sunlight. If you can't put duckweed near a window that receives 10 hours of sunlight, you can also use fluorescent light bulbs to help them grow. For best results, place the light bulbs 15 inches (38cm) above the tray. The duckweed won't grow under these light bulbs as well as it would with direct sunlight. Check the tray a couple of times a day and remove damaged duckweed from the tray. Replace the water in the tray with more freshwater. It will take 10 days or so for the duckweed to multiply. If transferring the duckweed to a pond in your garden, make sure that the pond is receiving plenty of sunlight. If you're moving the duckweed to an aquarium, make sure that the aquarium lid has a light source attached to it. Duckweed requires no further care or maintenance once it's in your pond or aquarium. You can get a suitable net in your local garden store.
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One-sentence summary --
Buy some duckweed at a pet store or harvest it from a pond. Disinfect the duckweed with potassium permanganate. Place the duckweed in a plastic tray with 1214 inches (3036cm) of depth. Position the tray so it receives 10 hours of sunlight daily. Change the water in the tray after 1 week. Use a net to transfer the multiplied duckweed to your desired location.