Hartley Magazine
Greenhouse growing
Month by month
As seen in Gardens Illustrated A new guide on the 1st of every month
Plants like peppers, chillies and aubergines, which need a long growing season should be sown this month. If you sow them now, they will ripen but leave too late and they will not. The third week in February is ideal, mid-March is fine and the first week in April is the limit. They need light, […]
It is not always practical to grow everything from seed, so make a list of plants you intend to sow and those to be bought as plug plants. Plug plants save time and space in the greenhouse and heating costs, too. Once you have placed your orders, write the labels for the seed trays, put […]
Open greenhouse vents for as long as possible on mild sunny days, shutting them before temperatures drop early in the afternoon. The 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, avoid chilling […]
The much publicised health benefits of turmeric, including anti-inflammatory and antioxidant properties, have made it a popular addition to everything from lattes to smoothies to teas. Although fresh turmeric tubers have been said to have more potent health benefits than the powdered turmeric sold in grocery stores, a small bag of them can cost upwards […]
It’s still not too late to sow batches of winter salads every week or two in an unheated greenhouse. Growing them in trays, pots, old growing bags or borders as ‘cut and come again’ crops to harvest through autumn and into winter. Try hardy salads like land cress, radish, carrots for leaves, any of the […]
Check your greenhouse heater to make sure that it works before the cold nights set in, have a roll of horticultural fleece on standby and pay attention to the weather forecast. It is worth investing in a back-up heater, too. There is nothing worse than being caught out by a sudden early frost Leave chillies […]
Early in the month, especially if 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 […]
Sow Fennel, oriental vegetables like mizuna greens and Pak Choi, rocket, coriander dill, spinach, claytonia and land cress, in modules as soon as you can in August. These will germinate quickly and can be planted out by mid-August for an Autumn harvest. Blossom End Rot, where the end of tomatoes becomes circular, black and flattened, […]
After a wet, cold May and low light, let’s hope plants and people can finally enjoy some sunshine. Aubergines, peppers and chillies should be transplanted into pots one or two sizes larger once they have formed a good root system but before they become pot bound. Transplant repeatedly until they reach a final pot size […]
Although we should be looking forward to May, it’s impossible not to comment on April’s extraordinary weather where conditions were totally alien gardeners in warmer parts of the UK. First sowings were abandoned or delayed and the ground was too cold and dry for transplanting. I have never known anything like it! First of all, […]
This is the time of year when the greenhouse becomes a plant production line, and shows its value for side stepping the effects of the weather – particularly in cooler areas. It’s also the time when you will be rewarded for the hours spent washing pots and trays during winter. Sow the following in trays […]
March usually says ‘Farewell’ to winter and ‘Hello’ to spring, a transition that seems to herald a month of erratic weather. I start sowing outdoors after warming the soil then add a few ‘back ups’’ under glass to fill the gaps if germination is erratic. In northern or cooler locations, you can also start sowing […]
