When considering which vegetable seeds to plant, for example, some attention should be given to hybrids. These seeds have been carefully controlled in cross-pollination to create a type that fills a particular void or ensures variety. In every instance of hybrid seeds, an explanation is given on the package or in a seed catalogue detailing why the hybrid was developed. Selection of seeds depends on the limits of your system and your requirements. Your requirements might be any of a dozen or so: self-pollinating, bush midget, staking, early fruiting and so on. In many instances, you will discover that, although a particular type of seed was not developed specifically for hydroponics, its qualities are such that it would appear to have been.
Growing midget seed varieties in particular can be an exciting and fun-filled part of hydroponic growing. Many of these are well suited to being grown indoors. There are three basic types: a small plant that produces normal fruit, a standard-sized plant that produces small fruit, and a small plant that produces small fruit.
Seed companies change the seeds they stock in retail outlets once a year, but many seeds are good for a long time. If you have part of a package left over from the previous year, it may not be necessary to throw it away and purchase a new one. Store leftover seeds in a dry, sealed container. To ensure that they stay dry you might want to place a dessicant like silica or dried milk powder in the same container. The germination rate in hydroponics is very high, and you will usually lose only a few days checking out leftover seeds. The following list will give you some idea of how long commonly used seeds last:
4 years 4 years
3 years 3 years
Pepper Radish Spinach Tomato
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