Spring Growth Demands Available Plant Food
Friday, July 31st, 2009Examine azaleas and rhododendrons for signs of stem borer; sawdust at the base of the stems is a sure indication. Look along the stem for the holes which the borers have made and run a wire into them or squirt some malathion or Orthene into them. If the plants are not thrifty or fail to flower dress them with a mulch of well-rotted manure to which some superphosphate has been added. Do not dig this in, however, for the surface roots will be injured in the process.
Coldframes should be shaded during May to prevent burning the plants under the glass and to reduce the need for watering. This shade can be provided by sprinkling limewash on with a brush or by spraying it on. If you want the shading material to last, mix some salt with it. I have found that by turning over the coldframe sash and sprinkling the lime on the underside of the glass, the material lasts all summer and is easily removed when required.
Ventilate well all plants that are being conditioned for a shift to the garden. Give adequate protection to tender plants such as begonias, gloxinias, ferns, seedlings and cuttings.