seeds – Charlton and Blackheath Amateur Horticultural Society

Pat’s 10 jobs for September 2026

Pat's Dahlias — Get more *Dahlia* flowers by regular deadheading,
make comfrey tea plant food, and learn from Beth Chatto’s dry garden

Comfrey ready to make comfrey tea — Get more *Dahlia* flowers by regular deadheading,
make comfrey tea plant food, and learn from Beth Chatto’s dry garden

1. Keep cutting or dead heading your Dahlias to keep the flowers coming, hopefully into October. Give them a weekly feed too.

2. It’s not too late to make some comfrey tea to feed your plants and veg. Just cut up handfuls of leaves and leave in a bucket with some water and a weight to hold it down. Try to cover the bucket as the smell is very unpleasant, then dilute 1/10 in water and aim at the base of plants you are trying to keep going.

3. I think this year we need to carry out a review of very dry areas in our gardens and replant with drought tolerant plants. If you made the visit to Beth Chatto her dry garden is an excellent example. I have a bank at the back of my garden and half of it looks very sad or even dead so I’ll be replanting some of it in the spring if things don’t come through.

Pat’s 10 jobs for August 2026

1. To be honest we know at the moment with the drought and the heat this column will be about the few things you can do to keep things alive. I am sure we will all have losses along the way, but remember all is not lost and will mean new planting opportunities for next year.

Fallen leaves can make an immediate mulch over damp ground, August 2026 — Impromptu mulch after watering

2. If you have weeds growing (even they are struggling at the moment!), pull out and place around plants to help hold the moisture in the soil. Make sure the weeds haven’t gone to seed and, if they have, pull the seedheads off and dispose of them.

3. Mulch the soil with anything you have to hand: your own compost, fallen leaves (as there seem to be so many) but make sure the soil is damp first so you can help lock in the moisture.

Pat’s 10 jobs for July 2026

1. Maybe in this challenging weather the best thing you can do is mulch the soil (after watering, so that the soil is moist and the mulch will retain that moisture). If you pull out weeds leave them on the surface to keep roots cool, use grass clippings if you have them but making sure to keep away from stems of plants.

2. To save water just water around the roots of plants by removing roses on watering cans and spray attachments on hoses.

Salvia 'Peach Parfait' — Salvias (‘Peach Parfait’, ‘Nachtvlinder’ and ‘Amistad’)

Salvia 'Nachtvlinder' — Salvias (‘Peach Parfait’, ‘Nachtvlinder’ and ‘Amistad’)

Pat’s 10 jobs for June 2026

1. There’s still time to direct sow some annuals like Cerinthe, Nasturtium, Nigella and Calendula for late flowering. Remember to thin out once germinated for decent size flowers.

Cerinthe major 'Purpurascens' — Cerinthe (honeywort), Nigella (love in the mist) and Calendula (pot marigold) can all still be sown now

Nigella damascena (love in the mist) — Cerinthe (honeywort), Nigella (love in the mist) and Calendula (pot marigold) can all still be sown now

2. Lily beetles are rife this year so be vigilant as they can devastate in no time (and they enjoy fritillaries too).

Pat’s 10 jobs for April 2026

1. Cut back those shrubby Salvias now if you haven’t already done so, both in the ground and in pots. Cut just above a shoot and they will grow away fast, but listen out for forecast of frost.

Cut back shrubby Salvia to a leaf node — Cut back shrubby Salvia, deter weeds (and possibly molluscs) with a gravel mulch,
and support your taller plants

Protect slug-magnets with grit — Cut back shrubby Salvia, deter weeds (and possibly molluscs) with a gravel mulch,
and support your taller plants

2. Some bulbs are now over so make sure to deadhead and then leave the foliage to die back naturally, and give them a good feed to build up the bulbs for next year.

Pat’s 10 jobs for March 2026

1. Time to cut back Buddleja davidii hard… don’t be timid, take it right back to 40cm to a pair of buds. If you want a taller plant make the cuts higher up the stem. It will grow back in no time. The prunings make good hardwood cuttings and root easily straight in the ground.

Buddleja davidii in need of a hard prune — *Buddlejas* before and after a hard prune (not the same plant!)

Buddleja davidii after a fairly hard prune - already developing new shoots! — *Buddlejas* before and after a hard prune (not the same plant!)

2. You can pot up Dahlia tubers now by placing in pots or trays of peat-free compost in a frost-free place, and water once with no need to water again until shoots appear. Make sure the tubers are firm with no sign of rot.

Pat’s 10 jobs for February 2026

1. It’s time to prune your Group 3 Clematis (the Viticella and Jackmanii type) to tackle tangled growth at the base so they can grow away strongly. Take all growth back hard to about 6 to 12 inches above the ground, cutting above a leaf joint. Then give them a feed and a mulch. It seems drastic but they respond well and will grow quickly. If it’s a fairly new plant check around the base for slugs which can quickly eat any weak new growth.

Clematis viticella 'Betty Corning' before February pruning — *Clematis viticella* ‘Betty Corning’ before and after a hard prune

Clematis viticella 'Betty Corning' after February pruning — *Clematis viticella* ‘Betty Corning’ before and after a hard prune

2. Cut back all spent foliage on grasses making sure not to snip emerging shoots. And look out for any seedlings to pot up for our plant sales table if you don’t want them!

CABAHS Resolution for 2026

In addition to gathering members’ personal gardening resolutions for 2026, our January meeting also launched the Committee’s proposal for a CABAHS-wide resolution for the year, inspired by Plant Heritage’s search for ‘missing collectors’.

The best way to save plants is to cultivate and propagate them, then share them with others.

– Roy Lancaster

Seed Collection and Cuttings!

Resolutions for 2026

At our January meeting, members were asked to share – anonymously – their garden-related resolutions for the coming year. In addition, the CABAHS Committee put forward a suggestion for a CABAHS-wide resolution for 2026 (more on this in a separate post).

A fine, wise, and hopefully achievable range of planned actions were submitted, with members resolving to complete practical tasks that are easily put off or forgotten, right through to adjusting their attitudes / approaches to their gardens.

Some of the CABAHS members' resolutions for 2026

CABAHS Committee Members Resolution 2026: Seed Collection and Cuttings

Always a good start:

“I am going to actually go into my garden.”

January 2026 talk: Clematis for every season

On Monday we welcomed Everett Leeds who gave us an amusing and highly informative talk about the prolific world of Clematis. He has been involved with Clematis for many years through growing, speaking and writing about them. He has been the Chairman of the British Clematis Society four times and is co-author of The Illustrated Encyclopaedia of Clematis . Everett’s enthusiasm for the genus was highlighted when he shared a photo of his former home with the front fence, hedges and trees completely swamped by a 120 foot long and 40 foot high ‘monstrous’ C. Montana. After cutting this completely away, he planted another!

Everett Leeds talking about Clematis CABAHS January 2026 — Everett Leeds discussing the vast range of Clematis and how to grow them from cuttings