Ian Robertson, Ltd.
Horticultural Tips
August Tips
q Soak any trees or shrubs that were planted this spring, if rainfall is light. Consider buying a rain gauge to keep track of rainfall - it is often less than you imagine.
q Be very careful when mowing or using a string trimmer around trees - damaged bark can allow entry for borers. This is particularly a problem for dogwood, flowering peach, flowering cherry and flowering plum.
q Watch Red Tip Photinia for signs of leaf spot and treat immediately if detected. Use a potassium bicarbonate spray on affected foliage (4 teaspoons / gallon of water.) Do not over water or over feed plants, and maximize air circulation by regular proper pruning.
q Kudzu is at its weakest this time of year - so launch an attack now! Mow where possible or allow livestock to graze it. Try to defoliate as much as possible. If you must resort to chemicals - try to use the least toxic possible.
q Inspect all plants for pests & treat as needed (use Neem Oil, Horticultural Oil, or Insecticidal Soap.) Mites, scale, lacebug, leaf miner, spittlebug, and leaf hopper insects are all still active in August.
q Fertilize annuals and container plants monthly with a liquid application of a general organic product.
q Continue to dead-head annuals, many perennials and roses to encourage continuous bloom.
q Transplant Bearded Iris in August.
q Fertilize roses lightly with a liquid fertilizer every six to eight weeks. It is preferable to use an organic fertilizer so that the soil microbes are being fed as well.
q Prevent mosquitoes by getting rid of standing water in your yard. Remember empty pots, watering cans and bird baths. The latter should be emptied and refilled every five days.