Alkaline-loving Plants: Trees & Shrubs
by Leslie Cox; Friday; April 14, 2017
Most plants will do okay in most soil pH ranges…acidic, neutral, alkaline. However, soil pH does have an impact on how well a plant is able to access necessary nutrients in the soil for its optimum health. Therefore, it is advisable to provide each plant in your garden with its preferred planting conditions. Here in the Pacific Northwest, this means alkaline-loving plants need to have the soil boosted up to at least a pH 6.5…or even higher. Applying wood ashes or scratching some lime into the soil at the drip line will certainly help raise the pH for these plants.
The following list will show which trees and shrubs in your garden would like some specialized treatment.
Latin name | Common name | pH range |
Acacia spp | acacia; wattle | 6.0 – 8.0 |
Acer negundo | boxelder maple | 6.0 – 8.0 |
Acer saccharum | sugar maple | 6.0 – 7.5 |
Berberis spp | barberry | 6.75 – 7.5 |
Buddleja spp | butterfly bush | 6.75 |
Buxus spp | boxwood | 6.75 |
Carya illinoinensis | pecan | 6.4 – 8.0 |
Citrus limon | lemon | 6.0 – 7.5 |
Citrus x sinensis | orange | 6.0 – 7.5 |
Clematis spp | clematis | 6.75 |
Cotoneaster sp | cotoneaster | 6.75 |
Eucalyptus spp | eucalyptus | 6.75 |
Fraxinus spp | ash | 6.0 – 7.5 |
Juglans nigra | black walnut | 6.0 – 8.0 |
Kolkwitzia amabilis | beauty bush | 6.0 – 7.5 |
Laburnum | golden chain | 6.75 – 7.5 |
Malus spp | crabapple | 6.0 – 7.5 |
Parthenocissus tricuspidata | Boston ivy | 6.75 – 7.5 |
Prunus domestica | plum | 6.0 – 8.0 |
Prunus dulcis | almond tree | 6.75 |
Pyrus spp | pear | 6.0 – 7.5 |
Rubus idaeus | red raspberry | 5.5 – 7.0 |
Salix spp | willow | 6.0 – 8.0 |
Spiraea arguta | bridal wreath | 6.75 – 7.5 |
Syringa spp | lilac | 6.75 – 7.0 |
Tilia americana | basswood | 6.0 – 7.5 |
Teaser Tuesday
by Leslie Cox; Tuesday; April 11, 2017
This hardy geranium is a real delight in the garden…stunning flowers over a very long bloom period. As with all of the hardy geranium species and cultivars, Geranium psilostemon is drought tolerant, pest resistant, disease resistant, and does not mind poorer soil conditions. For more information about this plant, click here and click here to find out about more hardy geraniums.
Photo by John Cox (click on photo to enlarge)
Seeds to start in April
Indoors…
- First week:
- Vegetables:
- asparagus, broccoli, cabbage, cauliflower, celery, celeriac, eggplant, fennel, leeks, melons, peppers, tomatoes
- Herbs:
- marjoram, oregano, rosemary, sage, stevia, summer savory, thyme, winter savory
- Flowers:
- agastache, lobelia, yarrow
- Vegetables:
- Second week:
- Vegetables:
- asparagus, cauliflower, celery, celeriac, eggplant, peppers, tomatoes
- Herbs:
- basil, marjoram, marjoram, oregano, rosemary, sage, stevia summer savory, thyme, winter savory
- Flowers:
- agastache, lobelia, yarrow
- Vegetables:
- Third week:
- Vegetables:
- asparagus, cauliflower, celery, celeriac, eggplant, peppers, tomatoes
- Herbs:
- basil, marjoram, oregano, rosemary, sage, stevia, summer savory, thyme, winter savory
- Vegetables:
- Fourth week:
- Vegetables:
- asparagus, celery, celeriac
- Herbs:
- basil, marjoram, oregano, rosemary, sage, stevia, summer savory
- Vegetables:
Direct sow in the garden…
- First week:
- Vegetables:
- arugula, broad beans, broccoli, cabbage, carrots, collards, corn salad, cress, endive, Florence fennel, kale, kohlrabi, leeks, lettuce, mustards, onions (scallions), onions (storage) Pac choi / Choi sum, parsnips, peas, radicchio, radishes, spinach, turnips
- Herbs:
- bergamot, borage, catnip, chamomile, chervil, cilantro, fennel, lavender, lemon balm, mint
- Flowers:
- calendula, celosia, clarkia, cleome, cornflowers, cosmos, delphinium, dianthus, digitalis, gaura, Lavatera (mallow), linum, lunaria, lupin, marigolds, nigella, oenothera, Papaver (poppy), phacelia, rudbeckia, saponaria, sunflowers, wallflowers
- Vegetables:
- Second week:
- Vegetables:
- arugula, broad beans, broccoli, cabbage, carrots, collards, corn salad, cress, endive, Florence fennel, kale, kohlrabi, leeks, lettuce, mustards, onions (scallions), onions (storage) Pac choi / Choi sum, parsnips, peas, radicchio, radishes, spinach, turnips
- Herbs:
- bergamot, borage, catnip, chamomile, chervil, cilantro, fennel, lavender, lemon balm, lovage, mint
- Flowers:
- calendula, celosia, clarkia, cleome, cornflowers, cosmos, delphinium, dianthus, digitalis, gaura, Lavatera (mallow), linum, lunaria, lupin, marigolds, nasturtiums, nigella, oenothera, Papaver (poppy), phacelia, rudbeckia, saponaria, strawflower, sunflowers, wallflowers
- Vegetables:
- Third week:
- Vegetables:
- arugula, beets, broad beans, broccoli, cabbage, carrots, collards, cress, endive, Florence fennel, kale, kohlrabi, leeks, lettuce, mustards, onions (scallions), onions (storage) Pac choi / Choi sum, parsnips, peas, quinoa, radicchio, radishes, spinach, Swiss chard, turnips
- Herbs:
- bergamot, borage, catnip, chamomile, chervil, chives, cilantro, fennel, lavender, lemon balm, lovage, mint, parsley
- Flowers:
- calendula, celosia, clarkia, cleome, cornflowers, cosmos, delphinium, dianthus, digitalis, gaura, helenium, iberis, Lavatera (mallow), linum, marigolds, nasturtiums, nigella, oenothera, Papaver (poppy), phacelia, rudbeckia, saponaria, snapdragons, statice, stocks, strawflower, sunflowers, sweet peas, tithonia, veronica
- Vegetables:
- Fourth week:
- Vegetables:
- arugula, beets, broad beans, broccoli, cabbage, carrots, collards, cress, endive, Florence fennel, kale, kohlrabi, leeks, lettuce, mustards, onions (scallions), onions (storage) Pac choi / Choi sum, parsnips, peas, quinoa, radicchio, radishes, spinach, Swiss chard, turnips
- Herbs:
- borage, catnip, chamomile, chervil, cilantro, fennel, lavender, lemon balm, mint, parsley
- Flowers:
- calendula, celosia, clarkia, cleome, cornflowers, cosmos, delphinium, dianthus, digitalis, gaura, helenium, iberis, Lavatera (mallow), linum, marigolds, nasturtiums, nigella, oenothera, Papaver (poppy), phacelia, rudbeckia, saponaria, snapdragons, statice, stocks, strawflower, sunflowers, sweet peas, tithonia, veronica
- Vegetables:
Transplant into the garden…
- First week:
- Herbs:
- chives, lemon balm
- Flowers:
- helenium, hollyhock, iberis, nicotiana, snapdragons, statice, stocks, sweet peas, tithonia, veronica, viola
- Herbs:
- Second week:
- Herbs:
- chives, lemon balm
- Flowers:
- columbine, helenium, hollyhock, iberis, nicotiana, snapdragons, statice, stocks, sweet peas, tithonia, veronica, viola
- Herbs:
- Third week:
- Vegetables:
- cauliflower
- Herbs:
- marjoram, oregano, rosemary, sage, thyme, winter savory
- Flowers:
- alyssum, asclepias, columbine, helenium, hollyhock, iberis, nicotiana, physalis, scabiosa, stocks, sweet peas, tithonia, veronica, viola
- Vegetables:
- Fourth week:
- Vegetables:
- cauliflower, onions (sweet)
- Herbs:
- bergamot, lovage, marjoram, oregano, rosemary, sage, thyme, winter savory
- Flowers:
- alyssum, asclepias, columbine, gaillardia, hollyhock, iberis, nicotiana, physalis, scabiosa
- Vegetables:
Posted on April 8, 2017