It has taken a little longer to write than I had planned, but I believe it is worth waiting for. In my last article I finished by mentioning raised beds. So here is part two about rock gardens and planting ideas beginning with "Sink or Troughs" as rock gardens.
Sink or Trough:
The idea of growing alpine plants in troughs and glazed sinks caught on in the 1930s. Using a container means that rock garden plants can be grown almost anywhere, including on your balcony or patio, the plants are raised above the ground, putting them in to easy reach. There is a less obvious virtue however, some difficult alpines which regularly rot outdoors can survive the winter in the exceptional drainage provided by a deep trough.
Many attractive reconstituted stone troughs can be found nowadays - the key feature to watch for is definitely an adequate drain at the bottom. Old glazed sinks can be covered with hypertufa which is the product of of 1 part cement, 1 part sand and 1 part fine peat blended to a moist mix with water. Place the sink or trough on firm supports in a sunny spot and cover the drainage hole with pieces of rubble and fill to within 2 inches of the top with a typical planting mixture. Allow it to settle for a couple of weeks and then plant up, aiming for a mixture of shapes, sizes and colours. Here you can use choice and delicate types to maximum advantage, but avoid rampant carpeters. Place some rocks between the plants and cover the suface using a 1 inch layer of stone chippings. Water on a regular basis through the growing season.
Dry-Stone Wall:
This really is amongst my favourites. A dry-stone wall is created without using any mortar. In northern rural areas of Britain youll see mile after mile of dry-stone walling built by bonding flat stones together, In the home garden, soil or planting mixture is used to fill the gaps between the stones. In these cracks, a vast range of rock garden plants could potentially grown.
There are actually two types of dry-stone wall, the free standing double-faced one with a central core of soil, and also the retaining type used to support a raised bed or face a bank. Building a free-standing wall should be left to a professional, but to build a retaining type is well inside the scope of the normal home gardener. Use limestone or sandstone - an easier-to-handle alternative is the dry-walling variety of reconstituted stone block. A wall above 1ft. will need a 6 inch foundation of rubble or concrete. Lay large, flat stones for your lower layers, pushing them together tightly with a fill of planting mixture between the sides and layers of stones. Each stone should slope downwards and backwards, a 10 degree slope is satisfactory. Plant as you go, placing the specimens sideways. Rooted cuttings are generally easier to use than plants that are pot-grown. Pack the mixture around the roots. When constructing a wall against an earth face, planting mixture should be packed n firmly to fill the area between the back of your stones and the front of your bank. Spray the wall with water when planting is finished, also water during dry weather until the plants are established. Recommended plants include Alyssum, Aubrietia, Dianthus, Phlox and Thyme for the sunny face and Arabis, Campanula and Saxifraga for a shady face.
Sink or Trough:
The idea of growing alpine plants in troughs and glazed sinks caught on in the 1930s. Using a container means that rock garden plants can be grown almost anywhere, including on your balcony or patio, the plants are raised above the ground, putting them in to easy reach. There is a less obvious virtue however, some difficult alpines which regularly rot outdoors can survive the winter in the exceptional drainage provided by a deep trough.
Many attractive reconstituted stone troughs can be found nowadays - the key feature to watch for is definitely an adequate drain at the bottom. Old glazed sinks can be covered with hypertufa which is the product of of 1 part cement, 1 part sand and 1 part fine peat blended to a moist mix with water. Place the sink or trough on firm supports in a sunny spot and cover the drainage hole with pieces of rubble and fill to within 2 inches of the top with a typical planting mixture. Allow it to settle for a couple of weeks and then plant up, aiming for a mixture of shapes, sizes and colours. Here you can use choice and delicate types to maximum advantage, but avoid rampant carpeters. Place some rocks between the plants and cover the suface using a 1 inch layer of stone chippings. Water on a regular basis through the growing season.
Dry-Stone Wall:
This really is amongst my favourites. A dry-stone wall is created without using any mortar. In northern rural areas of Britain youll see mile after mile of dry-stone walling built by bonding flat stones together, In the home garden, soil or planting mixture is used to fill the gaps between the stones. In these cracks, a vast range of rock garden plants could potentially grown.
There are actually two types of dry-stone wall, the free standing double-faced one with a central core of soil, and also the retaining type used to support a raised bed or face a bank. Building a free-standing wall should be left to a professional, but to build a retaining type is well inside the scope of the normal home gardener. Use limestone or sandstone - an easier-to-handle alternative is the dry-walling variety of reconstituted stone block. A wall above 1ft. will need a 6 inch foundation of rubble or concrete. Lay large, flat stones for your lower layers, pushing them together tightly with a fill of planting mixture between the sides and layers of stones. Each stone should slope downwards and backwards, a 10 degree slope is satisfactory. Plant as you go, placing the specimens sideways. Rooted cuttings are generally easier to use than plants that are pot-grown. Pack the mixture around the roots. When constructing a wall against an earth face, planting mixture should be packed n firmly to fill the area between the back of your stones and the front of your bank. Spray the wall with water when planting is finished, also water during dry weather until the plants are established. Recommended plants include Alyssum, Aubrietia, Dianthus, Phlox and Thyme for the sunny face and Arabis, Campanula and Saxifraga for a shady face.