Still Growing Strong—Your Garden in September
By Kathy Wright i New Leaf Nursery
This time of year, everyone says the same thing: “I can’t believe it’s September!” We’re saying it too. And while we’re looking forward to cooler days and crisp evenings—sitting outside on our decks and porches, enjoying the last glimmers of summer— our gardens are still calling our names.
September is the month to take advantage of these final warm weeks and plant your Brassicas. Don’t feel bad if you’re not sure what a Brassica is! They’re a group of plants known for their diverse, edible parts—leaves, flowers, stems, and seeds. This plant family includes a wide range of vegetables, such as broccoli, cabbage, kale, kohlrabi, turnips, rutabaga, cauliflower, and Brussel sprouts.
You can grow them from starts found at your local garden center. At New Leaf, our outstanding team can help you select the right plants and advise you on the best growing conditions. Here are a few tips from our experts:
Brassicas like cool, temperate climates. By this time of year, our 90-degree days are usually behind us, making way for cooler temps.
They prefer well-drained soil that’s rich in organic matter.
Brassicas are susceptible to pests and diseases, so preventive measures are essential.
September is a transitional time in our North Idaho gardens. With the first frost approaching, here’s a list of timely garden projects:
Plant spring bulbs: As a general rule, plant bulbs from September to November. Spring favorites like daffodils, tulips, crocus, and hyacinth begin rooting in warm soil before winter sets in.
Plant garlic and shallots: These can go in the ground now for overwintering and summer harvesting.
Plant new trees, shrubs, and perennials: Fall is an ideal time to plant! The cooler weather helps plants establish strong root systems before winter.
Mulch deciduous trees and shrubs, especially fruit-bearing ones, after the first hard frost.
Apply phosphorous fertilizer to everything that blooms or fruits.
Spread compost in your vegetable beds.
Spray deciduous trees with horticultural (dormant or all-season) oil after leaf drop.
And don’t forget about your flower pots that may be starting to fade. Brightly colored mums, pansies, kale, and ornamental grasses can refresh your containers for the season. Adding the right tones of autumn to your front door or deck with cheerful flower pots is a lovely way to welcome guests.
