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Home > 'Potting Grit'

'Potting Grit'

Auriculas

…third of his pots filled with drainage material! Someone growing for the first time might like to try our mixture which is two parts John Innes Potting Compost No.1, two parts soil-less Potting Compost and one part grit. We use this in plastic pots. For clay pots the amount of grit could be halved.…

What to do in the garden in September

…household waste. Don’t compost it as the spores may remain in the compost and reinfect your plants. * • Raise pots off the ground for the winter by using bricks or 'pot feet', to prevent waterlogging. * • Clear pond weeds and net your pond in anticipation of autumn leaf fall. *…

Thompson & Morgan Facebook Question and Answer session 2nd September 2011

…using grit in their potting compost. Why? and more intriguingly, what do they do with the gritty compost after? sieve it and recycle the grit? Answer: Hi Julie. Some plants need looser, more aerated compost than others, and adding grit helps to achieve this. The addition of fine grit will open…

Thompson & Morgan Facebook Question and Answer Session 8th March 2013

…Question: If you use grit or vermiculite with seed compost, once you have moved the seedlings on (pricked them out) what do most people do with the compost and grit remaining in the seed tray or pot? I usually tip the compost out onto the garden, but reluctant to do so if it has grit on it. Answer:…

Growing Hardy Geraniums from Seed

…surface and covered with a thin layer of compost and ¼inch (6mm) coarse grit. The compost should not be allowed to dry out completely; we find this is best achieved by using clay pots, plunged to their rims in grit in a shady place. Seed may be sown in autumn or spring, with the main flush of…

What to do in the garden in August

…too big! * • Take cuttings of herbs such as rosemary, sage or mint now to bulk up supplies. Put cuttings in moist, well-drained potting compost (one part grit to one part compost) and place in a cold frame. * • Established clumps of chives can be divided now. * • On a dry sunny day,…

Sowing Seeds

…Rinse over all containers with clean water before use. Pots and compost Seed sowing compost is a matter of choice. It should be free draining, yet capable of holding sufficient moisture to allow the seeds to germinate. Never use potting composts for seed sowing. They contain high levels of…

Thompson & Morgan Facebook Question and Answer Session 27th May 2011

…I want to make a gravel garden in a large clay pot what is the best mix? Answer: Hi Anna. Gravel garden and alpine soils mixes need to be very free draining. I would suggest that you use equal parts of garden soil, peat, and sharp sand or grit. The peat or (peat free compost if you prefer to…

Agapanthus

pot. When using containers a John Innes No. 3 potting compost should provide a suitable growing medium. This should not be allowed to dry out during the growing season and will probably need watering at least once a day in the summer, particularly if they are in terracotta pots. Conversely, pots

Thompson & Morgan Facebook horticultural question and answer session

…warmth to germinate (between 21-27ºC is a good temperature). They can take a few months to germinate so sow them in pots now and keep them warm indoors. Hopefully you'll be potting them on by late winter so they're ready to be planted out after the risk of frost has passed. By next year they should…

How to improve your garden soil

…the soil surface drying out and cracking in hot weather. * Never add sand to a clay soil as this may make it worse. You can use gravel or coarse grit although a lot is needed to make a real difference. It's best to just keep adding organic matter and choose suitable plants for your soil. * Try…

How to plant and grow bulbs, corms and tubers

…can be moved out of view while the bulbs die back and become dormant. Use a good quality general purpose compost and mix in a handful of fine grit to improve drainage. Alternatively you can choose specially prepared bulb compost. Water bulbs in containers regularly as they begin to grow, and…

How To Grow Herbs

…with a cloche. Growing Herbs in Pots and Containers Outdoors on the Patio Growing herbs in pots and containers is a great way to grow fresh produce if space is limited. Place them outside your back door for easy harvesting when cooking! Choose relatively deep pots, especially for large shrubby herbs…

How To Grow Asparagus

…garden compost into the soil to improve soil structure and fertility. If you are gardening on a cold, wet soil then the addition of sharp sand or grit will help to improve drainage. It's also worth making sure that the ground is completely weed free before planting asparagus crowns as it will be…

How To Grow Lavender

…but not wet and do not exclude light as this helps germination. * When the seedlings are large enough to handle, transplant them into 7.5cm (3") pots and grow lavender plants on in cooler conditions until they are well established. * When all risk of frost has passed, gradually acclimatise young…

Facebook question

…the seedlings. As runner beans and tomatoes are quite large plants and will need to be kept indoors for a longer period, I would pot them up individually into 9cm pots to allow for good root growth. For future reference it is best to sow runner beans at the end of April or throughout May because…

Facebook questions Oct 29th

…adding plenty of grit to the soil to improve the drainage. Name: Lorraine Question: Hi, we just purchased some Lathyrus plugs from you. Should they be over-wintered indoors / in the greenhouse or can we plant them straight out into the garden before the ground gets too cold? I've potted them up and…

Hellebores

…autumn and winter period which triggers the germinating process. It is a frequent complaint by gardeners that Hellebores, although carefully sown in pots will not germinate, or at best very poorly, while self-sown ones beneath the parent tend to come up like proverbial mustard and cress. The primary…

Thompson & Morgan Facebook Question and Answer Session 13th August 2010

…Crocosmia then it may be worth experimenting with some varieties again, but this time improve your soil by adding lots of well rotted manure and some grit to improve fertility and drainage. I would also provide a thick mulch of chipped bark to protect them over winter (and retain moisture in the…

Thompson and Morgan Facebook Question and Answer Session 5th April 2013

…(Dietes grandiflora) is best kept in a cool, well-lit spot outdoors or in an unheated room. Try covering the seed with a 5mm layer of compost or grit to help keep the seeds cool. It's best not to provide artificial heat as this may prevent germination. We have checked and we don't have Xerophyllum…

Thompson & Morgan Facebook Question and Answer Session 18th February 2011

…neighbours dogs!) Answer: Hi Emma. You are not alone with this problem and in my experience they will use just about anything as a toilet - even pot plants! There are many repellents available that are claimed to deter cats including orange or lemon scents which cats dislike the smell of. The home…

What to do in the garden in December

…year. * • If you still haven't planted your tulip bulbs there is still time, provided the ground isn't frozen. * • Spread fresh gravel or grit around alpine plants. In the vegetable garden * • Lift the last of your leeks and parsnips before the soil becomes frozen, and heel them in to…