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Hartley Magazine
Greenhouse growing
Month by month
As seen in Gardens Illustrated A new guide on the 1st of every month
Overwintering chillis and forcing mint.
Clear autumn leaves from gutters as they start to fall. Prevent downpipes from clogging by putting a pan scourer in the hole at the top, then clearing the debris as it backs up, from time to time. Collect rainwater in a waterbutt, when it is full, water at the base of fences under the eaves […]
May is transition time
It’s a busy time in the greenhouse. Sow courgettes, climbing and dwarf beans, chard, beetroot, salad onions and tender herbs including basil and coriander. ‘Harden off’ and plant outdoor pumpkins, melons and tomatoes and courgettes in their permanent positions once the danger of frost has passed. Plant courgettes into organic rich soil, trough slits in […]
It’s time for sowing and planting – spring is here!
Sow celeriac, spinach and turnip in modules early in the month. Use peat free seed or finely sieved multipurpose compost; larger seeds like peas and beans can be sown in straight multipurpose compost. Sow half-hardy annuals including climbers for ornamental outdoor displays. Like all greenhouse grown plants, they need ‘hardening off’ ready for transplanting once […]
Pollination to potting on, March is a month for action.
Peaches and nectarines flower early in the year when there are few insects about, so hand pollination is the only way to ensure a good crop. It works best after two or three dry warm days when most of the flowers are open. When the time is right, there will be a dusting of pollen […]
Now’s the time to chit, sow and prune.
From February onwards, it is time to sprout (or ‘chit’) new potatoes and the first big sign that the gardening year has started. Put your potatoes in a tray or egg box with the ‘rose’ end, where all the buds are, at the top, keep them at about 7C (45F), then, after four to five […]
Wash and sow – there’s plenty to do in the greenhouse
Happy New Year! Here’s to fabulous crops, few pests and many pleasurable moments pottering in your Hartley greenhouse. With the wet weather, there is no better place to shelter as you check your plants. If you haven’t done so already, a water butt to collect rainwater from the roof is a ‘must’ and can be […]
Last orders for the Festive season.
This image is a testament to climate change! Harvest any crops which remain in the unheated greenhouse. Start Amaryllis bulbs into growth as soon as you can, watering sparingly at first; just trickle a little tepid water around the bulb, increasing the amount as the bud appears. Once it is growing strongly, keep the compost […]
Getting ahead before autumn arrives
With 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 like Land cress, oriental salads, like pak choi, mizuna and mibuna greens, lettuce, lamb’s lettuce, carrots for seedlings, chicory and radish. You can also use what’s left from earlier […]
Planting potatoes and sowing biennials
If you’d like to eat new potatoes at Christmas (or earlier), it is time to plant them now, when late season, second early potatoes, stored in temperature-controlled conditions are sent out from late July to early August. They can easily be grown in pots. Stand two or three tubers on a 12.5cm layer of multipurpose […]
Ripening crops and harvest time
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 […]
Pinching out and potting on
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 […]