Once tomatoes have set their fourth or fifth truss of fruit, cut off the main stem one leaf above the terminal truss, so the moisture and nutrients are focussed on swelling and ripening the fruit. Tap the open flowers around mid-day when the pollen is dry to encourage further pollination and tie the stems to […]
Now that greenhouse tomatoes are growing rapidly, remove the side shoots of ‘cordon’ varieties, as they appear, using your finger and thumb, to create a single productive stem to train up the cane. Keep the compost constantly moist using tepid water, checking regularly, particularly if you use growing bags as the compost dries out rapidly […]
It is important to ‘harden off’ or acclimatising greenhouse grown plants to outdoor conditions before finally planting them out. Move them straight from greenhouse to garden and they can suffer from shock, particularly in cooler weather; most recover but it checks growth, causes yellowing and some vegetables may ‘bolt’ or run to seed. ‘Hardening off’ […]
Sow broad beans, spinach, cabbage, calabrese, kohlrabi, cauliflower, lettuce, peas for pods and shoots, onions, salad onions, turnip, radish, beetroot, leeks, leaf beat and chard under glass in pots or modules for later transplanting outdoors. Sow bunching onions, beetroot and round rooted carrots in pots for later transplanting outdoors. From the middle of the month […]
It’s a good time to repot citrus just before they start into growth. To keep my lemon tree at a manageable size, the old compost is teased gently from the roots, which are then trimmed back by about 1/3 and repotted into peat free John Innes no 2 mixed with 20% horticultural grit for drainage. […]
There are two important jobs for the greenhouse at this time of year. From February onwards, it’s time to sprout (or ‘chit’) first and second early potatoes and sowing tender, long season crops like tomatoes. Gardeners’ ‘chit’ potatoes so they are already growing when planted, – it’s a chance to get ahead. The technique is […]
If you didn’t sow your broad beans last autumn, January is the ideal time to get sow seeds in the greenhouse for an early harvest. Sow them on edge 5-8cm apart and 2.5cm deep in deep trays of peat free multipurpose compost or individually in 7.5cm small pots. Put them in a cool frost-free greenhouse […]
Start Amaryllis bulbs into growth, watering sparingly at first; just trickle a little tepid water around the bulb, then increase the amount as growth appears. Once they are actively growing, keep them constantly moist but not waterlogged and take care not to get the growth tip wet. They need temperatures around 20C so move them […]
Victorian gardeners ‘forced’ mint for Christmas for garnish, adding to roast vegetables during and after cooking and at the same time took the opportunity to repot their pots of mint. Pot grown mint should be divided and re-potted every couple of years. Growing in pots preferable because it can spread and become a weed; if […]
Now that the weather is starting become distinctly autumnal, it’s time to pick your last tomatoes and ripen them on the windowsill or greenhouse. Some green, blemish free fruit can be stored in a cool drawer, to be ripened in the fruit-bowl or in a paper bag with an over ripe banana, as needed during […]
Ventilate the Greenhouse on warm days but reduce this when temperatures drop later in the month and the amount of shading, so crops ripen and to avoid problems with grey mould caused by damp air and cooler nights. Before bringing plants in for overwintering check them for pests and diseases, and treat accordingly. Red spider […]
It’s time to 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. These will germinate quickly and can be planted out by mid-August for cropping in autumn. Continue sowing ‘cut and come again’ crops like mixed herbs, in pots, […]
