Seed Basics: A Q&A with Lois and Jim Hole

Is it better to grow my annuals from seeds, or should I just buy bedding plants?

Lois—Let your interests be your guide! Growing annuals from seed is a great pastime, especially if you’re eager to start gardening while there’s still snow on the ground. However, some varieties are easier to start from seed than others. We had a heck of a time growing bells of Ireland from seed until we discovered, quite by accident, that they require a cold treatment before they will germinate. If they hadn’t been set down on a cold concrete floor, we never would have discovered what were doing wrong!

Jim—Mom’s right. There’s nothing more frustrating than planting a tray full of seeds only to be faced with a barren pack even after weeks of care. To avoid disappointment, choose easy-to-germinate seed like marigolds and nasturtiums, and buy bedding plants if you want to grow the more demanding annuals like begonias and alyssum. Of course, if you like the challenge of growing the picky species from seed, by all means, give them a try. Just take the time to learn a little about their needs.

 

When should I start my seeds?

Lois—It depends on when you’re going to transplant your seedlings outdoors. For example, here in St. Albert the average last spring-frost date is May 6. We transplant our pansies outside 3 weeks before that in mid-April. Pansy seedlings take about 14 weeks to grow from seed, so we start the seeds in mid-February. It takes a bit of planning, but it’s worth it. By May last year, I had pots filled with pansies on my deck, and they received rave reviews.

Jim—People spend a lot of time worrying about frost. They don’t realize that many annuals need to be outside and growing in the early part of the growing season. More plants are finished off by heat and drought in the summer than by frost in May! In our experience is actually better to put annuals like pansies outside and cover them than to leave them indoors and have them stretch out from being too hot. There’s really no substitute for planning. Read your seed packets carefully, check on the average last spring-frost date for your area, and do the math for yourself.

 

What are the easiest annuals to start from seed?

Lois—By and large, the bigger the seed is, the easier it is to grow. If you start off with larger seeds such as sweet peas, nasturtiums, and marigolds, you’re almost guaranteed success. Once you’ve gotten the hang of it, you can move on to smaller seeds, which tend to be more challenging to grow.

Jim—The sweet pea is the easiest annual to grow from seed. Not only is a sweet pea seed big, it’s nearly indestructible! It doesn’t mind if you give it too much water or too little. It’s disease resistant and easy to handle because it’s so big.  On the other hand, tuberous and fibrous begonias are among the trickiest annuals to seed.  The seeds are almost as small as dust particles. You can barely see them, let alone pick them up with your fingers. These seeds require consistently warm soil, and just the right amount of fertilizer; otherwise they starve. Raising begonias from seed is definitely a challenge compared to the easygoing sweet pea!

 

What do I need to grow my own plants from seed?

Lois—First you need the very best-quality seeds. My mother-in-law, Grandma Hole, always said, “Only the rich can afford to buy cheap things!” If you start off with inferior seed, you might as well not even bother. Also, you’ll want to give those seeds a good home, so be sure to buy a professional seedling mixture.

Jim—You can start with as little as seeds, potting soil, flats, and a sunny window. If you’re ready to get a bit more serious, though, it’s worth investing in the right equipment

Basic equipment checklist
• the best available seed
• the best-quality soilless mix (Seedling Starter Mix)
• a mister bottle
• clean plastic flats
• grow lights
• covers (plastic or fabric)
• fine-textured vermiculite to cover your seedlings
• a thermometer with a probe (an oven meat-thermometer works well)
• heating cables/mats
• fungicides (optional)
• Earth Alive Soil Activator
• tags to label the different varieties

 

Do I need a special kind of soil for my seedlings?

Lois—Yes! Even though you can get reasonably good results from regular potting soil, you’ll have better luck if you use a special mix for your seedlings. I always use Seedling Starter Mix. It has just the right components for healthy seedlings.

Jim—I agree wholeheartedly. For the best seedlings, you should always start off with the best soil. Spend the few extra dollars and invest in a professional seedling soil. Regular potting soil is too coarse and variable to risk using on your seedlings.

 

What are hybrid seeds?

Lois—There are many different kinds of hybrid seeds. One hybrid seed tends to be very similar to the next, unlike non-hybrid seeds, which sometimes surprise you when they bloom! Hybrid seeds are more expensive than their non-hybrid cousins, but the extra pennies are worth
it! Plants that grow from hybrid seeds tend to have all kinds of bonuses, like bigger and more colourful blooms, greater disease resistance, and better growth habit.

Jim—Development of hybrid plants is a complex procedure that ultimately, if everything goes right, results in very uniform varieties.

 

Can I plant the seeds collected from hybrid plants?

Lois—You can, but only if you’re prepared for unpredictable (and often downright unsuccessful) results. Hybrid plants don’t make good parents!

Jim—Seeds taken from hybrid plants don’t grow “true to type.” You can collect and sow hybrid seeds, but only half of the resulting plants will look like the variety that you collected the seed from. The other half will be divided evenly—the two quarters resembling the two parents that gave rise to the hybrid.

 

What other factors are important for good germination?

Lois—Even though I always emphasize the importance of watering, oxygen is just as important for your seeds. If you keep your flats saturated with water, your seeds will drown. You also need to check your seed packets to see if your seeds require special conditions to germinate.

Jim—Oxygen and moisture must penetrate a seed’s coat in order for it to germinate.  Apart from that, different seeds have their own requirements. For example, the smallest seeds (like alyssum, begonia, coleus, and petunia) generally require light in order to germinate. Other seeds, such as larkspur, phlox, and verbena, prefer to germinate in the dark.

Some seeds actually need a little abuse to get started! In one process, scarification, the seed coats are cut or abraded in order to allow water and oxygen to penetrate. In another process, stratification, the seeds are stored in a cold, moist environment for several weeks or months, to simulate the passing of winter.

 

What things can contaminate my seedlings?

Lois—Take the time to practice good sanitation. You must be careful to work in a clean space with clean tools. And wash your hands, too!

Jim—Disease can enter the picture at several points.

• Containers or other tools. Rinse your tools, plus any previously used flats or trays, in a 10%-bleach solution.

• Improper sanitation. Listen to Mom! Always wash your hands before working with your seedlings. Tobacco carries the mosaic virus, while certain foods like lettuce carry damping-off diseases.

• Unpasteurized soil.

• The seeds themselves. Some diseases live in the seed or on the seed coat itself. Buy only the best-quality seeds.

• Dirty water or dirty watering cans (tap water is fine, provided it’s not high in salts—sodium in particular).

 

Do I need to use pesticides to grow seedlings?

Lois—No. Pesticides are not the answer. Ted and I used to grow our seedlings without using pesticides, and to this day, we still do. The key is sanitation, sanitation, sanitation! If you keep everything perfectly clean, you won’t have to rely on chemicals.

Jim—I agree. You don’t need pesticides to grow your seedlings, especially if you use a professional seedling mixture. This is the key—garden soil introduces many unwanted potential problems for seedlings. Fungicides, on the other hand, can be an important investment. Even with the best sanitation, fungal diseases can occasionally find their way to your seedlings.