Messing Around With Seeds

Plan Now, Plant Later

The Wind in the Willows, one of my favorite children’s books, has a great quote that came to me recently. The water rat says to his friend, the mole, “Believe me, my young friend, there is NOTHING — absolute nothing e_SEmD half so much worth doing as simply messing about in boats.”

What, you might fairly ask, does that have to with gardening? Well, at this time of year I would substitute the word “seeds” for “boats.” Messing about with seeds is wonderful — for the soul, for the mind, and later — for your garden. It’s time now to start planting seeds indoors for summer vegetables.

I generally plant tomato seeds indoors around April 10, sometimes a bit sooner, for planting outdoors eight weeks later. I have already planted onions, celeriac, a few special peppers and lots of lisianthus (an annual cut flower). Those all need more than eight weeks. Later, four to five weeks before planting time in June, I will start my squash and cucumber seeds in 3-inch pots. By starting them indoors and putting out good-sized plants, I am able to prevent them from being eaten by striped cucumber beetles. Those beetles can devour a freshly germinated seedling outdoors in a single night — but won’t do much to plants with 6-inch vines.

There are a couple of keys to success growing tomatoes and other seedlings indoors. Most important is having adequate light. You really cannot grow healthy seedlings by depending on sunlight on a windowsill. You need lights — either the new-fangled LED lights for plants, or T-8 fluorescent fixtures that are 4-feet long and provide good light for seedlings. You do not need those special (read expensive) “Gro-Light” bulbs with special wavelengths (equivalent to the sun) for starting seedlings.

Last year in this column I wrote directions for building a simple A-frame plant stand, so will not repeat them this year. You may find it at my web site, Just go to the search engine box and type in “plant stand.” Or, if you prefer, design your own or buy a light stand from your local garden center or from Gardeners Supply ( But you do need lights to succeed.

It is also critical that seeds and the potting mix do not dry out, especially when the seeds are just starting to open and send out little roots and shoots. They are particularly vulnerable then. So check your seeds every day and water as needed.

You can also get clear plastic covers to fit over your growing flats. These allow light to pass, but hold in water. Water will evaporate, then condense on these covers and rain down gently on your seedlings. You could accomplish the same effect with plastic wrap, but the plants would butt heads with the wrap as they germinated. The plastic covers provide an inch or two of growing space, allowing some to grow while others are still waking up.

Commercially prepared seed-starting mix is largely composed of peat moss. Peat moss has no “food value” to plants. It provides a light, airy space that roots find easy to penetrate, and it holds water. Most have some fertilizer added, but this soon disappears either by washing away or being used up by the plants. So, as your plants get bigger, plan on giving them liquid fertilizer — or they will languish.

Seaweed or fish fertilizers are readily available, and are better than chemical fertilizers — they provide a full menu of minerals, including the micronutrients important for plants. Fish fertilizers may offend some delicate noses indoors, however.

An alternative to growing seedlings in straight potting mix is to mix it 50-50 with compost. It probably makes sense to buy compost for this even if you make your own. Why? Because commercial compost should be weed-free and your own compost probably is not. Unless you know what each seedling looks like when it first germinates, you may end up babying weeds along — or pulling out your seedlings. This can be a real problem when growing flowers that you have not grown before.

Lastly, think about planting seeds by the position of the stars and moon. I know, I know, it sounds pretty “out there.” But last year I used the Stella Natura ( planting calendar, which uses biodynamic principles to determine when to plant or transplant, and I saw real differences when I experimented with planting in the designated blackout times. Seeds are still one of life’s mysteries — all that life packaged in such a small container. Who knows what really affects them? Not me, that’s for sure.

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