Planting and shopping
• Bulbs Shop nurseries for bulbs planted in 4- or 6-inch pots. For sunny spots, choose agapanthus, calla, canna, crocosmia, dahlia, gladiolus, and tigridia. For shade, you can't beat tuberous begonia.
• Landscape plants Plant balled-and-burlapped or container-grown groundcovers, vines, trees, and shrubs, including roses from the Flower Carpet series.
• Try columnar planters Create freestanding towers of flowers with containers set on columns from Kinsman Company (800/733-4146). Plastic-coated steel baskets are lined with fiber mats that have holes cut in the sides, so you plant in the top and the sides. We’ve had great results with them in Sunset’s test garden. Plant now, so foliage and flowers will completely cover the baskets in summer.
• Grow hotter peppers Scoville heat units, which measure the fire of peppers, range from practically zero for bell peppers up to 350,000 SHU for habaneros ― but any variety of pepper will develop more heat when grown in a warmer place versus a cooler spot. If you grow your peppers against a south wall, the higher ambient temperature, reflected heat, and protection against prevailing winds will combine to turn up the spiciness of the pepper.
• Sow annuals to fill bare spots In a sunny bed of well-prepared soil, sow cosmos, marigold, nasturtium, portulaca, sweet alyssum, and zinnia. When they become seedlings, transplant them to spaces that have opened up after edibles were harvested or flowers faded on earlier bloomers.
• Use groundcovers for dry banks Exposed, dry banks may seem like daunting places to plant, but many groundcovers grow well on them. Try Arctostaphylos uva-ursi, any kind of thyme, or trailing types of ceanothus, cotoneaster, juniper, or rosemary.
• Prevent wormy apples If last year’s ripe apples had one hole bored into the fruit and one hole out, you had coddling moths (apple worms). If your fruit was riddled with tunnels, you had apple maggots. Both pests will be back, unless you take preventive measures; spray trees with an organic pesticide containing spinosad.
• Treat aphids The insects deform tender new leaves and, more important, spread plant diseases. When you begin to notice
a lot of aphids, blast them off plants with a jet of water from the hose. You may have to go through the process two or three times for complete control. In serious cases, follow up with a spray of insecticidal soap.
• Deadhead flowering plants Snip faded flowers to prevent seed from setting, which slows or stops the bloom cycle.
• Divide perennials After bloom, dig up spring-flowering irises, Oriental poppies, and primulas, and divide them. Some plants, like Oriental poppies, can be separated root by root; others, like irises, have to be cut apart with a shovel or knife. As you work, throw away or compost woody or dead parts of the root.
• Prune candles on pines Light green, finger-like shoots of new growth on pines are called candles. As needles begin to open, you can break off the top half of each candle to limit growth. This old bonsai trick works well with landscape pines.
Next: Grow summer herbs