Gardening with vegetables and annual flowers is a race against time and the elements. If you jump the gun, spring frost may knock back tender seedlings. If you delay too long, yields may be reduced because plants won’t fully mature before fall freezes arrive or the excessive heat of summer stymies growth. Onions are an example of a plant sensitive to day length. Varieties adapted to the northern U.S. form biggest bulbs during the long days of June and July. Delayed planting results in decreased bulb size because they form during the shorter days of late summer.
In response to this year’s mild winter, I’m betting on an early spring. I seeded onions in the greenhouse in mid-January. The seedlings are up and growing strong, and will soon be ready to transplant into the garden. If you haven’t started onion seeds yet, you can still direct seed them in the garden, purchase transplants from a garden center, or plant onion sets.
This weekend I’ll be starting dozens more vegetables and annual flowers in the greenhouse seed-starting chamber. When seed orders arrive, I file away seed packets by planned start date, storing them in the extra refrigerator in the garage to prolong their viability.
I did a quick inventory of seed packets to start on March 1, and came up with the following list of things that I’ll be planting this weekend.
Salvia ‘Summer Jewel Pink’ (an All-America Selections winner for 2012) and ‘Blue Victoria’;
Dianthus ‘Parfait Raspberry’;
Celosia ‘New Look Red’;
Gomphrena ‘Dwarf Buddy’ and ‘Qis Purple’;
Baby’s breath ‘Gypsy Deep Rose’;
Lavatera ‘Hot Pink’;
Marigold ‘Hero Bee’;
Snapdragon ‘Twinny Rose Shades’;
Lobelia ‘Crystal Palace’
Tomato ‘Lizzano’, ‘Terenzo’ (AAS winners for 2011), ‘German Johnson’, ‘Mortgage Lifter’, ‘Pruden’s Purple’, ‘and ‘Pompeii’;
Pepper ‘Black Olive’, ‘Cayenetta’ (AAS winners for 2012), ‘Odessa Market’, ‘Corno di Toro Giallo’, ‘California Wonder’, ‘Gordo’, ‘Premio’;
Eggplant ‘Black Beauty’;
Basil ‘Queenette’ and ‘Mrs. Burn’s Lemon’;
Broccoli ‘Liberty’, ‘All Season’s Blend’, and ‘Romanesco’;
Chinese cabbage ‘Little Jade’ and Michihli’;
Lettuce ‘Garden Babies Butterhead’;
Beet ‘Bull’s Blood’
I’ll wait several weeks to start quick-growing heat lovers such as zinnias, squash, and ornamental cotton. By then, I’ll move frost-hardy annuals to the covered deck or front porch to acclimate to outdoor growing conditions. They’ll grow slower there than in the greenhouse, but as the adage goes, “slow and steady wins the race”.