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The Bay Gardener by Dr. Francis Gouin

Don’t over-handle your onions

Onions are bulbing. Disturbing the plants now will reduce the storage life of the bulbs. Keeping your onion patch free of weeds is important, but from now until harvest you’ll want to weed by hand. An onion hoe may damage bulbs.

Even with compost you can overdo it

Recently a Bay Weekly reader complained she could not grow cauliflower or broccoli. The plants grew big and lush but never produced edible heads — all this despite the large amount of compost she added to her garden soil each year.

Biosolids are safe for food ­production; here’s why

Since I became involved in composting biosolids in the early 1970s, technology for processing wastewater has undergone major changes. Back then, most wastewater treatment facilities had only primary or secondary treatment technology. At the same time, industries were dumping all kinds of waste into sewer systems.

Break the rules and root vegetables won’t grow

A Bay Weekly reader complained that most of the carrots, radishes, turnips and salsify he harvested from last year’s garden had branched roots. My immediate diagnosis was that he must have added a lot of compost to the soil before planting. When root crops are planted in soil rich in freshly applied compost, they tend to produce branched and fibrous roots.

Death by herbicide is the first step toward no-till farming

This spring, Chesapeake Country meadows turned from green to the color of straw. It’s been a strange sight and one you’ll see more of in coming years. No, it’s not a symptom of climate change. It’s a step in no-till farming.     No-till farming offers many advantages over conventional farming.

Feed new plants or warm the soil

Like air, soil is slowly warming. When soil temperatures are below 60 degrees, soil microorganisms are rather inactive and plants have fewer nutrients to absorb. As the soils warm, the microorganisms become active and more nutrients become available.

Others need warm soil to germinate

It just takes a few warm days for some gardeners to decide it’s time to plant the garden. Depending on what you plant, you may suffer for your haste.     Some seeds will germinate in cool soils, but others will only germinate after the soil warms to 70 degrees. When those seeds are planted in cool soils, the seeds will often rot before they get the warmth they crave. Read seed packets for suggested germinating temperatures.

Bloom is the best thing to come out of D.C in a long time

The demand for organically grown food continues to increase. Because chemical fertilizers cannot be used in its production, growers must depend on natural sources for nutrients, such as animal manures, compost and green manure crops. The demand for compost is so great that it exceeds the supply.     The problem may soon be solved by recent developments in processing biosolids.

Trouble’s brewing below the surface

Mother Nature mulches in the fall by dropping leaves from her trees and by laying the blades of grasses or the leaves of herbaceous perennials over the soil. She covers the ground only with the waste she produces.

The misnamed Jerusalem artichoke supplies both

The Jerusalem artichoke is a sunflower cousin that gives both flowers and food. In late August and into September, bright yellow flowers cover its tall stems. Below ground, it is growing tuber-like structures on its roots that resemble pachymorphs of the bearded iris. The tubers are edible.