As the nights draw in and temperatures drop there is still plenty to do in the greenhouse. Sow sweet peas in a cool greenhouse for an early display next year. For more details, see October’s diary. Continue to sow batches of winter salads weekly in an unheated greenhouse (See September diary). As temperatures are lower […]
Sow sweet peas indoors from October to November. Soften the seed coat, by putting the seeds on a layer of kitchen towel on a dinner plate, put another layer on top. Dampen the towel, drain off excess water and sow as soon as they begin to swell or sprout, usually after about 48 hours. Those […]
When it is warm and sunny, sow trays, pots or old growing bags with ‘cut and come again crops’ to harvest through autumn and into winter, think land cress, oriental salads, like pak choi, mizuna and mibuna greens plus lettuce, lamb’s lettuce, chicory and radish. You can also use what’s left in the packets from […]
I’ve been having one or two problems with Blossom End Rot, where the end of tomatoes becomes circular, black and flattened. It occurs in peppers and aubergines, squashes and watermelons but is most often seen in tomatoes and is caused by lack of calcium in the fruits. Plants growing in soil, growing bags and potting […]
While temperatures remain high, watering and ventilation are top of the list. Open vents early in the morning, as temperatures in the greenhouse soon rise (shading should be in place by now), water preferably in the evening or early morning and check plants several times a day to ensure that they don’t dry out. Consider […]
Now your greenhouse tomatoes are growing steadily, it is important to remove the side shoots of ‘cordon’ varieties to form a single productive stem. You don’t need scissors or secateurs, just snap them off with your finger and thumb. Make sure your tomatoes are well watered, too, particularly if they are in growing bags where […]
From now on my monthly tips are going to focus on what to do in the greenhouse, so let’s start with a few tips what to look for when buying a greenhouse. Buy the largest you can afford and leave space for expansion because however large your glasshouse, it will never be large enough! It […]
If you didn’t have time in the autumn, transplant conifers and evergreens later in the month, when soil temperatures rise. Dig round the plant just beyond the spread of its branches, cut carefully through any larger roots with a pair of old secateurs, keeping root damage to a minimum. Once the root ball is free, […]
If you are growing C. orientalis and C.tangutica; Clematis texensis, Clematis viticella and their cultivars and the large flowered hybrids like ‘Hagley Hybrid’ and ‘Perle d’Azure’, now’s the time to prune. This group flowers in summer and autumn on the current year’s stems, so select the strongest pair of buds near the base, and cut […]
‘If the soil sticks to your shoes it is too wet’ but if conditions allow, now’s a good time to lightly fork over your flower borders, avoiding the crowns of perennials and emerging bulbs mixing in a layer of leaf mould or compost you go. This will improve the soil and relive compaction at the […]
Open greenhouse vents for as long as possible on mild sunny days over winter, shutting them before temperatures drop early in the afternoon. A combination of high temperatures and low light makes leaves and stems soft, spindly and prone to grey mould which spreads rapidly in cool, damp conditions. Though good air circulation is vital, […]
Now it is getting chilly, terracotta or glazed pots should be wrapped with several layers of ‘bubble wrap’ or hessian and raised from the ground on bricks or pot feet to stop water-logging and reduce the chances of cracking. They can also be over-wintered in a frost-free glasshouse, at the base of a sheltered wall, […]
