Nettle grows worldwide, and is a favorite of mine. It has a long history as a food and a medicine. It’s actions are astringent, diuretic, galactagogue, hemostatic, and tonic. Typical preparations of nettle as food is steamed and eaten in salads or pastas. Nettle soup is served by a hospital chef nearby. Nettle can be used as a pot herb, so go ahead and throw some into your pot of stew or soup or sauce. Nettle leaf is used traditionally as a diuretic, and has even been used to make a hair rinse for dandruff. Nettle has been found to be a valuable anti-inflammatory particularly in the treatment of allergic rhinitis, relieving almost all symptoms of itchy and watering eyes, sneezing and running nose.
If you are wild harvesting your own nettle, wear gloves, or figure out how to become a nettle charmer (someone who knows how to pick it without getting stung). Precautions are advised for people on diuretics meant to lower blood pressure. It’s unlikely that small doses, like in cooking or tea blends, would be deleterious. Herbalist Susun Weed suggests making a nettle tonic to cleanse and tonify the body systems and she uses a lot - about a cup of dried herb, covered with boiling water in a quart jar - steeped for 4 hours.
I like making a cup of nettle tea with about a tablespoon of the herb to a cup. If you decide to use nettle like a tonic, use it daily for a week or so, then take a break. The taste is mild and it’s loaded with vitamins and minerals. I do not sweeten this tea. This is an herb that needs to find it’s way back to our kitchens. It generally reaches maturity in the summer months and is worth learning to identify and harvest.
Dr. Nancy Offenhauser makes a strong endorsement for the use of nettle tea in her groundbreaking book, “Healing Cancer Peacefully” - see chapter 28 - ‘Polly Put the Nettle On.’
Dr. James Duke, the retired FDA herbalist, lists nettle for allergies, Alzheimer’s disease, arthritis, asthma, baldness, bladder infections, bronchitis, bursitis, cough, gingivitis, gout, hives, kidney stones, laryngitis, multiple sclerosis, PMS, prostate enlargement, sciatica, and tendinitis, which are mostly symptoms related to inflammation, diuresis, or allergic reactivity.
Dr. Judy Griffin reminds us about the use of nettles by Native Americans to relieve arthritis.
So even though the classifications like anti-inflammatory or diuretic weren’t common knowledge, people used nettle to treat exactly those kinds of conditions. None of this information is a secret. It’s a healing plant found almost everywhere growing naturally. My belief is that when we utilize the herbs, flowers, and plants of Creation they are both healing and preventative.
The Purple Coneflower
There are few fragrances that hearken to the memory more than the Lilac. The scent is sweetly intoxicating. It fills a room or wafts gently on the breeze. 
Dandelion is reputed as an enemy of the well kept lawn by some. But, to others, the humble dandelion is an age old remedy and much esteemed plant. It has a very long history as both a food and a medicine, including Native American traditions. It attracts bees and butterflies when in flower, which makes it a good companion for fruit tree pollination. Children delight to blow the little puff ball heads that contain the seeds. That is how dandelion reseeds. Birds, animals, people, and the wind all help propagate this plant. 
Lavender (Lavendula officinalis, augustifolia)
This very ancient herb has been used for centuries, traced through the Egyptians, Greeks, and Romans. In Hispanic cultures this is the familiar “Manzanilla”. There are really two distinct herbal chamomiles - German Chamomile (Matricaria chamomilla, or recruita) and the Roman Chamomile (Anthemis nobilis). The German Chamomile variety is the sweet, apple scented herb usually found in herbal tea preparations. Roman Chamomile is much bolder and quite intense. German Chamomile is an annual in most places. Roman Chamomile can occur as a perennial. The flower is a tiny daisy-like bloom, which is used in all three forms beyond the garden - as an herb, essential oil, and flower essence.