10 jobs for the month – Page 2 – Charlton and Blackheath Amateur Horticultural Society

Pat’s 10 jobs for May 2025

1. Border irises are really doing their thing now and the show can be brief but make sure to keep the soil around their roots free of weeds so their rhizomes can bake a bit in the sun.

2. Time to Chelsea chop your tall perennials to stop them flopping later or to extend flowering. Good candidates are Phlox, Penstemon, Helianthus, Sedum/Hylotelephium – and I include vigorous Clematis too. You can either do the whole plant at once or just some stems to extend flowering, although it may result in smaller flowers.

3. Deadhead displays of pot plants like Violas to keep them flowering and stop them going to seed. Remember to give them a feed to keep the display going.

Hylotelephium telephium 'Touchdown Teak'

Pat’s 10 jobs for April 2025

1. Pinch out sweet pea plants above the third leaf to make bushier plants and then, as the shoots grow, pinch out side shoots in the same way.

2. Sow hardy annuals now like Nigella, opium poppies and poached egg plants in any bit of empty ground you may have and mark them so you don’t forget where they are. Many of these are excellent for pollinators.

3. Prune hardy Fuchsias now to stimulate growth by cutting back to just above a healthy bud which will prevent them from getting too woody.

Nigella damascena seedlings — Young sweet pea plants

4. Check Dahlia tubers for any growth and make sure they’re getting enough light by turning them round regularly towards the light.

Pat’s Jobs for March 2025

Time to pot up those Dahlia tubers in 3 litre pots, making sure the tubers have an ‘eye’ which will shoot. Cover in compost, allowing the stem to rest at the surface, then label and water and keep somewhere reasonably light and frost free (greenhouse or windowsill) until they start growing.

2. Now is the time I start sowing sweetpeas: five seeds to a 3 inch pot and keep on a light windowsill or greenhouse until they germinate. You can try sowing directly into the soil which I think works well for some.

Pat’s Jobs for February 2025

1. It’s time to cut back those late-flowering clematis…the viticella small-flowered types and the ones flowering after June. All that rain last year made mine grow rampantly so cut back hard to just above a bud, 6 to 12 inches from the ground, and give them a feed and a mulch.

Late flowering viticella clematis — Late flowering viticella Clematis

Clematis viticella - two varieties — Late flowering viticella Clematis

2. You can also cut back some of the slightly early-flowering types like jackmanii varieties and Comtesse de Bouchard, but it’s best to check individual varieties or you’ll lose all your flowers for this year. Other varieties such as early varieties like Montana should be trimmed back after they flower in Spring, unless overgrown – when they require drastic action and you’ll be sacrificing the flowers for a year or two. Anyway, please check.

3. If the ground is frozen or too wet then don’t be tempted to walk on it for fear of damaging the structure. Seems impossible at the moment to get much done!

Pat’s Jobs for January 2025

1. Prune Wisteria this month and next by taking all side shoots back to 2 or 3 buds. Very old plants may need severe pruning to show off the flowers.

Very tangled wisteria waiting to be pruned — Very tangled Wisteria in need of pruning!

2. Start pruning roses in earnest although some are still unbelievably flowering. Remove any foliage with blackspot and don’t compost. Old roses respond well to hard pruning so don’t be afraid, removing all dead and dying wood and cutting stems back to above a bud.

3. I had to remove dead Clematis shoots from a Daphne Jacqueline Postill and in doing so pulled off some of the flowers so take care and do it soon if you can. But leave the main prune until next month.

Pat’s Jobs for November 2024

1. Check for blackspot on roses and make sure to remove the leaves by checking the bush itself and below it. But don’t add to the compost heap.

2. If you have to, this is the best time to move trees and shrubs, but have your planting hole ready, and dig up with all the root ball and replant quickly, watering well until settled.

3. Plant your tulips and hyacinths now. either in the ground or in pots – but protect from squirrels.

4. If you sowed sweet peas last month. harden them off now and it’s still not too late to get some going for an early crop.

Pat’s Jobs for October 2024

1. Watch out for Cabbage White caterpillar on your Nasturtium: at our allotments they appear to be the new delicacy which they are devastating and they look like the only butterflies that are thriving.

Cabbage white caterpillars on nasturtiums

2. Make sure to plant lots of butterfly-friendly plants next year like Sweet Rocket, Scabious, Honesty and others. The butterfly count showed that butterfly numbers are very much down this year and we desperately need them. Please ask me for Honesty seeds if you want some.

Asters for Butterflies — Scabious for butterflies and bees

Pat’s Jobs for September 2024

1. Start ordering your bulbs now as all the bulb catalogues are arriving – though prices don’t stop going up!

2. Start planting bulbs when they arrive but save your tulips until later as they are prone to virus and rotting, and to theft by squirrels.

3. Divide large established clumps of perennials by cutting back first, then splitting either by hand or with two forks back to back. Delay if soil is heavy or too wet.

Split established clumps of perennials — Order Spring Bulbs

4. Replace tired summer bedding in pots and replant for winter and replenish with fresh compost.

Pat’s Jobs for August 2024

1. It is especially important to keep Camellias and Rhododendrons damp at the roots this month as this is the time that the buds form for next Spring. Water well and mulch if you can.

2. Take Aeonium cuttings now by severing leggy leaf stems a couple of inches below a cluster. Leave the stem end to callous over, then push into gritty compost and keep in a shady spot until roots start to form.

Pat’s Jobs for July

1. Top of the list for July is pruning wisteria, taking back that whippy growth to 2 to 3 buds from the main stems.

2. Sweetpeas should be flowering by now so make sure to keep cutting the blooms and give them a feed and plenty of water. They cease flowering quickly if not picked twice a week.

3. Deadhead all your perennials and annuals regularly unless you want them to set seed for next years sowing.