Questions about starting an indoor garden
Indoor Herb Garden
Indoor Herb Garden
Organic perennial herbs can be a healthy and beautiful addition to indoor gardening efforts. Herbs, when chosen for their growing environment, tend to be high in heartiness and low in labour. The key is choosing the best organic herbs for your home.
Consider using an indoor herb garden kit that provides the right size of pots; organic herb seeds that grow best indoors; and instructions on how to grow herbs, when to water and 'feed' them, and how to keep them healthy year round.
1. What are some herbs that are especially easy to grow on a windowsill?
Most mints, scented geraniums, rosemary, bay leaf tree, savory, oregano, are some of the easier ones.
2. Which type of container is best? Plastic or terra cotta? Why?
Unglazed terra cotta is better than plastic. The reason is simple: terra cotta allows moisture and air to pass through and plastic does not. That roots need air seems counterintuitive, but they are living tissue and they need to respire just like you and I. If gasses in the root zone are not able to move, the roots will rot. This is what happens when the soil becomes "water-logged": the crevices around the roots become filled with water and the roots cannot breathe, and if the drainage is poor the roots will eventually turn mushy.
Whether plastic or terra cotta containers are used, it is important to make sure that there are drainage holes at the bottom to allow excess water to drain out. If it takes more than a minute for water to begin to drain out of the holes after a thorough watering (to the rim of the container) then you don't have enough holes or you have a poor draining soil.
3. What sort of soil do you suggest?
Inexperienced gardeners may think that if soil in the garden is good enough to grow herbs or other plants, then the same soil must be good enough for potted herbs. That's wrong because of the water drainage factor. Good garden soil drains well enough in the garden, but in a container the walls of the container restrict the movement of water in the soil column. Even in unglazed terra cotta containers it is important to use a good potting mix that contains amendments such as perlite or vermiculite or sharp builder's sand to allow water to move freely.
A potting mix made with compost, peat, and perlite works best
4. How much light? Exposure? Water? Fertilizer?
Herbs need as much light as possible, preferably the natural variety from the sun. Direct sunlight, at least four or five hours a day, is the minimum herbs need. Even with that, and with plants positioned close to a south, east or west facing window, I like to recommend supplying supplemental artificial light from growlights.
I often feel that I am battling popular notions about raising plants that are quite wrong. For instance, people often ask, "How many times a week do I water my herbs?" and I will answer bluntly that I don't know. I always say herbs need to be checked frequently, and only watered if the soil feels dry to the touch. In the winter that might work out to once a week while in the summer that might be once a day. Your finger is a marvelous water meter, so use it to check the soil moisture.
When watering, it is better to water more throughly and less often. A good principle to follow is to water until water comes out of the drainage holes in the bottom of the container.
While many herbs can thrive in poor garden soils, they need decidedly more nutrition when grown in containers. That's because the container restricts the range of the root system and the plant cannot exploit as much soil volume as it does in the garden. We like to apply a fertilizer such as liquid fish emulsion or a 20-20-20 chemical formulation. Use half the recommended concentration biweekly but only during the periods when the herbs are actively growing.
5. What if pests or diseases become a problem? Do you suggest organic controls?
The main problems on indoor herbs are whiteflies and spider mites, and occasionally, aphids can get out of control, as can mealybugs and scale. For whiteflies, spider mites and aphids, Safer's insecticidal soap spray works very well. The key is to drench the plants with the spray so every surface of the plants is covered. For aphids and spider mites, I recommend dipping the whole above ground portion of the plants in a bucket of insecticidal solution mixed from the spray concentrate. The great thing about soap spray is that it is harmless to animals and humans.
If you have the misfortune of getting mealybugs or scale, I recommend discarding your herbs and starting with new plants. Organic solutions for mealybugs and scale are not very effective and chemical controls are too nasty for human consumption.
6. Any tips for harvesting? How do you know when it's time? Is there a best way to snip?
Apart from the higher light requirement, herbs differ from most house plants in one very important way: they have to grow more than just a good show of foliage, they have to grow extra so you can harvest some of it. Unfortunately, indoor conditions conspire to make herbs grow less profusely indoors than out, and one has to adjust expectations accordingly. For example, a basil plant in a sunny garden will produce a quarter-pound of leaves in a single cutting, but a potted basil indoors would soon expire if hacked back that much.
The sooner the herb hacking mindset is replaced by a more delicate and selective pinching mode, indoor herbs stand a chance of surviving through a winter season. Because indoor herbs tend to "reach" for the light and become leggy, it is best to pinch them at the growing tips, thereby forcing a bushier, more attractive growth form. Select sprigs of about one to two inches at the growing branch tips for cutting.
7. Can you eat rosemary with mildew on it?
I have never tried using mildewy rosemary so I can't attest to the taste, but I would guess that the flavour wouldn't be much different. To treat mildew, try a mild wash with solution of 1 part hydrogen peroxide (available from the drug store) in 3 parts of water. Weekly or biweekly applications should get rid of the mildew fungus.
8. Are the essential oils in herbs as strong in those grown indoors as out?
Herbs are aromatic because they have essential oils that volatilize to the air. For reasons that are not entirely clear, herbs produce these oils in greater quantity or greater concentration when grown in full sun. In the less abundant light of indoors, aroma and flavour are not as strong but they are still quite acceptable, and for many people almost as good as outdoor herbs.
For further information and advice on growing organiic herbs indoors, you might like to visit https://sites.google.com/site/auganix/gardening-the-green-way for further information
Questions about starting an indoor garden
By: Dayle Rudman
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